$\int\left(4\cos^2\left(x\right)\sin\left(x\right)\right)dx$
$\:\frac{x^4-y^4}{x^2\:+\:y^2}$
$x^4-2x^2-48$
$p\left(x\right)=\left(a-2\right)x^2+2\left(x+b\right)+a$
$13-5+17+4-20$
$\frac{dy}{dx}+5y-3e^{-2x}=0$
$\frac{9}{25}a^5b+\frac{3}{5}a^2c-\frac{27}{75}a^2bc$
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