$\frac{dy}{dx}\left(5^y=x^2+y\right)$

$-2senx^2$

$\int\frac{-x^2+3x-1}{x^3+x}dx$

$3.\left(-8\right)+\:\left(-12\right):\left(-3\right)-\left(-5\right)$

$3x+9-x=-1$

$17\left(-33\right)$

$\log_{\frac{1}{8}}\left(\log_{\frac{1}{4}}\left(\log_{\frac{1}{2}}\left(x\right)\right)\right)=\frac{1}{3}$