An Easy Rational Expression Problem

Another Sum of Series: Sum of (3n+4)/n(n+1)(n+2)

2024 = 24 Choose k. Find k.

A Simple Yet Well-Made Problem [Korean CSAT 2016]

300th Video - When 1234567891011121314... is a 300-Digit Number

Comparing Two Numbers with Fractional Exponents

Practicing Long Multi-Step Proof: Polynomial Algebra, Quadratic Equation, and Integer Roots

A Proof About Derivatives

Another Logarithm Problem

Can You Find the Functions Inside the Integrals? (2 Ways)

Solving Some Trigonometric Equations

√81 = 8+1. What About 4-Digit Numbers?

Factoring a⁴ + b⁴ + c⁴ - 2a²b² - 2b²c² - 2c²a²

The Good Ol' Related Rates [Korean CSAT 2007]

Is 81 the ONLY Two-Digit Number with This Property?

These Trig Problems Are Simple. I Promise.

Exponential and Logarithmic Madness

A Geometry Problem which is Really an Algebra Problem

Simple Limit, in 2 Ways

Solving the Derivative Problem in a RIGHT Way

Permutation, Combination, and Their Relation to Number of Functions

Solving sqrt(x+3) = sqrt(x)+1+sqrt(2) | Radical Equation

I Wasn’t Going To Generalize This, But...

Counting the Number of Triangles

Calculating Areas by Integration: Simple Problems

Standard Deviation of Arithmetic Progression? [Korean CSAT 2003]

A Simple-Looking Recurrence Relation

Finding the Expression for the n-th Composition of x/(ax+1)

Another Sum of Series: Sum of Σn/(16n^4-8n^2+1)

TOTALLY SOLVABLE Quadratic-Cubic System