$\int\frac{2x-1}{\left(x+2\right)\left(x-1\right)}dx$

$\frac{d^5}{dx^5}\left(x^2\cdot\sin\left(x\right)\right)$

$\int\cot\left(5x^3\right)\left(6x^2\right)dx$

$\left(17ab\right)\left(-4b^2\right)$

$x^2+11x-7=0$

$\lim_{x\to\infty}\left(\frac{x^2-40}{x-4}\right)$

$\left(2x+1\right)\left(4x^2+1\right)$