$\frac{p^6q^4}{p^3q^{16}}$

$\frac{\frac{\cos\left(x\right)}{\sin\left(x\right)}}{\frac{1}{\sin\left(x\right)}-\frac{\sin\left(x\right)}{1}}$

$\left(4a-2b-7c\right)+\left(5a-3b-7c\right)$

$e ^ { 1 } - e ^ { - 1 }$

$18\:-\:7\:.\:3\:$

$\left(10x^2a\:+\:9bc\right)\:\left(9bc-\:10x^2a\right)\:$

$\frac{d}{dx}\left(2xy^2-x^2y-y^2+3x+\arctanh\left(\sin\left(2xy\right)\right)\right)$