$e^x\cdot y\cdot\frac{dy}{dx}=e^{-y}+e^{-8x-y}$

$f\left(x\right)=\left(x^2+4x\right)^3\cdot\ln\left(\frac{x+2}{x}\right)$

$\:50\:\::\:\left[\:\:\left(\:5^2\:x\:2\:\right)\::\:5\:+\:15\:\right]\:-\:1$

$\frac{dy}{dx}=\frac{1}{\pi}\left(3\sin\left(x\right)^2-1\right)$

$5\:-\sqrt{2}\:+5\:+\sqrt{2}$

$\int\frac{sinhx}{\left(1+coshx\right)}dx$

$a\:\:+\:\:\:2\:b\:\:\:\:\:si\:\:\:\:\:a\:\:=\:\:3\:\:;\:\:b\:\:=\:\:4\:$