$a^{-1}bc^7\cdot ab^{-3}c^3\cdot a^0bc^0$

$\frac{dy}{dx}=\frac{2x}{y^4}$

$\left(-1\right)x\:\left(-8\right)x\:10\:x\:\left(-3\right)\:x\:\left(-20\right)$

$\lim_{x\to\infty}\left(6x^{\frac{1}{x}}\right)$

$\lim_{x\to2}\left(\frac{x^2-4}{x-3}\right)$

$13x^2y^2+65x^3y$

$\int\frac{sen^3\:4x}{\cos^2\:4x}dx$