$\int\left(\frac{2x-3}{\left(x^2+4\right)\left(x-2\right)}\right)dx$

$14d-9+21w-7dw+2$

$5.5-\left(5.1-3.61\right)$

$\lim_{x\to0}\left(5x^2ln\left(x\right)\right)$

$\frac{d}{dx}\left(\sin\left(x\right)\right)\sin\left(2x\right)\cos\left(x\right)\sec^2\left(x\right)$

$\frac{1}{2\cos\left(x\right)}$

$\sec=4$