$3\cdot\left(-2\right)+\left(-3\right)$

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

$\left(12-15\right)-\left(3+2+1\right)-4-\left(1+2-6-7\right)$

$\frac{dy}{dx}=3x^2-8x+5$

$\lim_{x\to4}\left(3x^2\right)$

$-n^2\cdot5n$

$\int\:\frac{x^3+8}{x+2}dx$