$w=x^2y-y$
$\frac{x^2-3x-10}{x^2-8x+15}$
$\int cos^{19}xsinxdx$
$3sin^2\theta\:-14sin\theta\:+8=0$
$\sec^2\left(x\right)-\cot\left(x\right)^2=1$
$\frac{dy}{dx}=\frac{xe^x}{4y}$
$2b^{-4}\:a^{-1}b^3$
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