Differentiate y = x^3 + 2x^2 + 4x + 7

To differentiate you bring the power down and multiply it by any coefficients (numbers in front of the xs) then subtract one from the power 

So x³ becomes 3x² 

2x² becomes 2*2x^2-1 = 4x

4x becomes 4*1x^1-1 = 4

7 is a constant so can't be differentiated

Final answer: 3x² + 4x + 4