$27x^3+135$

$d^2\left(\frac{5x^4}{4}-3x\right)$

$\int\left(\frac{x^2}{\sqrt{\left(16-x^6\right)}}\right)dx$

$\frac{4}{25}\int x^3\cdot e^{-\frac{2x}{5}}$

$12\left(2+7+1\right)$

$12x=-36$

$\frac{\sin\left(x\right)}{\sin\left(x\right)+1}=\frac{\csc\left(x\right)}{\cot^2\left(x\right)}$