$\int\frac{z^3}{\left(z^2-4\right)^{\frac{3}{2}}}dx$
$\frac{3x^2y+15}{x^2-25\:}$
$190=146+74sin\left(\frac{\pi}{6}t\right)$
$\frac{2x^2+5x-3}{2x+2}$
$y^{-10}\cdot y^9=\frac{y^{13}}{\left(y^2\right)^6}$
$y=x^2-x^{-1}$
$50ab+125ab$
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