# What is the derivative of  (x^2+x)^2?

I would use the Chain Rule to derive the ${\left(\right)}^{2}$ first and then the argument as in:
$y ' = 2 {\left({x}^{2} + x\right)}^{2 - 1} \cdot \left(2 x + 1\right) = 2 \left({x}^{2} + x\right) \left(2 x + 1\right) = 2 x \left(x + 1\right) \left(2 x + 1\right)$