$3tanx\:+\:15\:=\:3$

$\frac{dy}{dx}\left(\sqrt[4]{\frac{x}{y}}\right)$

$-6-\left(5+3-15\right)$

$\frac{dy}{dx}+y^2-\left(10+2e^{10x}\right)y=-e^{20x}$

$8\:\cdot\:\left[10\:\cdot\:\left(1\:+\:1\:-\:2\right)\right]\:\cdot\:3\:+\left[6\:-\:\left(1\:-\:5\right)\right]$

$\left(x+7\right)\cdot\left(x+2\right)+36$

$3.202-0.9$