$\int\frac{2x+1}{\left(x-2\right)\left(x-3\right)\left(x+5\right)}dx$

$\frac{d}{dx}2xy+2x$

$2\csc\left(a\right)=\sec\left(\frac{1}{2}a\right)\csc\left(\frac{1}{2}a\right)$

$x+275=685$

$y=x^{\frac{3}{4}}\cdot\frac{\sqrt{x^2}+1}{\left(3x+2\right)^5}$

$\frac{-1}{2x-4}>6$

$\int\:-e^{-x}\:dx$