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Live tutors · Midnight-ready · First problem free

The math clicks
this time.

Step-by-step walkthroughs for Calc II, AP Stats, and everything in between — written the way a tutor explains, not a textbook.

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Solve: ∫ x·ex dx
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How It Works

Real problems. Real solutions.

Every session starts with the actual problem in front of you — not a generic explainer, but your specific confusion, untangled.

01The Problem
Open calculus textbook with dense formulas and minimal explanation
1:04 AM · Calc II due 8 AM
"I've read this page four times and I still don't get it."

Textbook explanations assume you already know the thing they're trying to teach. Integration by parts shows up in a single paragraph with no worked examples.

Proof's Response

We walk through it like a tutor sitting beside you.

1
Identify u and dv
Pick u = x because it simplifies when differentiated
2
∫u dv = uv − ∫v du
This is the formula — we'll use it every time
3
x·eˣ − eˣ + C
Each step annotated in plain English

Student submitted the problem set at 2:17 AM. Got an 89.

02The Problem
Exam paper with red correction marks and a low score at the top
AP Statistics · Chapter 7 Test
"My exam came back with red marks I can't decipher."

A -12 in red ink tells you nothing. Students need to understand why the logic was wrong, not just that it was — especially before the next exam.

Proof's Response

We rebuild the logic from the mistake outward.

1
Locate the exact error
We pinpoint where the reasoning broke down
2
Rework with correct method
Full rework shown step by step, not just the answer
3
Pattern recognition drill
Two similar problems to confirm the concept stuck

Retake score: 76 → 91. Same student, two weeks later.

03The Problem
Parent and high school student sitting together at a desk looking frustrated at homework
Parent · 9th Grade Algebra II
"My son's teacher explained it once and moved on."

Polynomial long division isn't intuitive. When a teacher moves at class pace, the students who need three more examples get zero. Parents end up searching YouTube at 10 PM.

Proof's Response

As many examples as it takes. No moving on.

1
(x³ + 2x − 5) ÷ (x − 1)
Start with a concrete problem, not abstract rules
2
Divide · Multiply · Subtract · Bring down
Four-step rhythm repeated until it's automatic
3
Remainder theorem shortcut
Bonus: show the faster method once the long way is solid

His next quiz: 100%. Mom emailed us just to say thank you.

Subjects We Cover

Whatever's on the problem set, we've seen it.

From a single equation to a full proof-based assignment — every level, every subject.

High School · College

Calculus

Limits, derivatives, integrals, series. From AP Calc AB to Calc III.

Integration by PartsRelated RatesTaylor SeriesMultivariable
Middle School · High School

Algebra

Equations, factoring, systems, polynomials — the foundation everything else builds on.

Polynomial DivisionQuadraticsSystems of EquationsInequalities
AP · Intro College

Statistics

Probability, hypothesis testing, regression. AP Stats and beyond.

Normal DistributionConfidence IntervalsChi-SquareANOVA
College

Linear Algebra

Matrices, eigenvalues, vector spaces, and abstract proofs — demystified.

Matrix OperationsEigenvaluesProofsTransformations
High School

Geometry

Proofs, theorems, coordinate geometry, and the logic behind shapes.

Two-Column ProofsTrigonometryCirclesCoordinate Geo
College · CS

Discrete Math

Graph theory, combinatorics, logic, and proofs for computer science students.

Induction ProofsGraph TheoryCombinatoricsSet Theory
Student Stories

The grade is the proof.

Before and after — real scores, real students, real subjects.

Before
54
Calc II Midterm
After
88
with Proof
"I submitted my first problem at 11:45 PM and had a full walkthrough by 12:20. I actually understood it — not just copied it. That's new for me."
Marcus Webb, college freshman smiling
Marcus Webb
Freshman, Calc II · University of Michigan
Before
61
AP Statistics Final
After
94
with Proof
"My daughter was in tears over AP Statistics. After two sessions with Proof, she was the one explaining confidence intervals to me. I was stunned."
Patricia Okafor, parent smiling warmly
Patricia Okafor
Parent of AP Statistics student · Houston, TX
Before
71
Linear Algebra Final
After
89
with Proof
"Three weeks before finals I had a C in Linear Algebra. The eigenvalue explanations here are better than anything in my lecture notes. Ended with a B+."
Siddharth Nair, computer science student
Siddharth Nair
Sophomore, Computer Science · Georgia Tech
4,200+
Problems solved
18 pts
Avg grade improvement
94%
Students submit again
< 45 min
First response time
Get Started

Your first problem, solved free.

Snap a photo of your problem, tell us your subject and deadline, and a tutor will walk you through it — step by step.

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Free Download

"The 12 Calculus Mistakes
Everyone Makes"

A 14-page PDF written by our tutors covering the most common errors we see — chain rule slip-ups, sign errors, u-substitution traps — with correct worked examples for each.

Forgetting the chain rule inside integrals
Misapplying L'Hôpital's Rule conditions
u-substitution boundary errors
9 more with full corrections

Just your email. No spam, ever.

Your problem is private — never shared or resold
Average first response: under 45 minutes
4.9 / 5 average satisfaction rating