Sure! Here's a list of math problems that progress from easy to hard:

1. Easy

Problem: Solve for $x$:
$3x + 5 = 20$

2. Medium

Problem: Simplify the expression:
$\frac{4x^2 - 9}{2x + 3}$

3. Challenging

Problem: Solve the quadratic equation:
$x^2 - 5x + 6 = 0$

4. Hard

Problem: Evaluate the integral:
$\int (2x^3 - 4x^2 + 3x - 1) \, dx$

5. Very Hard

Problem: