$50x^6y^2z^4-10x^2y^6z^5$

$\cot\left(x\right)=\cos\left(x\right)\sin\left(x\right)+\cos\left(x\right)\csc\left(x\right)$

$\int_0^47xdx$

$f\left(x\right)=\frac{4}{\sqrt{\left(x^2+4\right)^3}}dx$

$\lim\:_{x\to\:\:64}\left(\frac{\sqrt{x}-8}{\sqrt[3]{x}-4}\right)$

$\frac{d}{dx}\left(x+5\right)^{2x}$

$\frac{\left(x+y\right)^2-2^2}{\left(x+y\right)-2}$