$\left(xy^2-5xy^3\right)\left(xy^2+3xy^3\right)$

$\frac{1}{y}.y'=\left(\frac{1}{0.5x+19}+\frac{1}{x}\right).\sqrt{y}$

$tan\left(x\right)^6$

$\sqrt[3]{\left(-3.99\right)^2+5\left(-3.99\right)-4}$

$\int\frac{10x-2}{\left(5x^2-2x+1\right)^3}dx$

$-\:\left(-9\:+\:5\right)\:-\:\left(3\:-\:7\right)\:+\:\left(-3\:+5\right)$

$48\cdot\left(26+-36\right)$