$-20-4-365+55-12-8$

$\sqrt{1-y^2}dx\:=\:\sqrt{1-x^2}dy,\:y\left(0\right)=\frac{5}{2}$

$2\cdot\left(\sec\left(\frac{\pi}{8}\right)+\csc\left(\frac{\pi\:}{8}\right)\right)$

$\frac{5-12x}{\left(1+6x\right)\left(4+3x\right)}$

$\frac{d}{dx}\left(f\left(x\right)=\left(\frac{1+2x^2}{14-11x}\right)^4\right)$

$3.50\cdot160$

$4x+8x+-16xy$