$\lim_{x\to0}\left(x^2e^{-\frac{x}{2}}\right)$

$\int sin\left(8t\right)sec^2\left(cos\left(8t\right)\right)dt$

$\frac{d^2}{dx^2}\left(8x^2-7x\right)\left(4x^3\right)$

$5\log\left(x\right)+2\log\left(x\right)$

$4x^2+10x-24$

$\int\frac{1}{4x^2-4x+1}dx$

$\frac{1+\cos\left(x\right)}{\sin\left(x\right)}+\frac{\sin\left(x\right)}{\cos\left(x\right)}$