Trying to speed up question rate.

1. x²b + 3b + 2x³ - 7

2. If you have a bag of 10 marbles, 3 purple, 1 red, 4 blue, and 2 yellow, what is the chance of getting a yellow, a blue, a red, or a purple? (Find the percent amount of each color.)(Solved already)

3. sqrt(64)/5 - (3/4)/2 + 42