$\left(\frac{1}{5}a^3b^2-8ab^3\right)\left(\frac{1}{5}a^3b^2+8ab^3\right)$

$\frac{7}{\left(x+1\right)}\:=\:\frac{5}{\left(x-1\right)}$

$\frac{d}{dx}2x-y$

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

$\lim_{x\to\infty}\left(\:\left(\frac{\sin\left(6x\right)\cos\left(e^{x^2+6}\right)}{x^6+6}\right)\right)$

$\frac{27y^3-8}{3y-2}$

$145.8+136.65+162.62+1000$