$\int\frac{2+ax}{4}dx$
$17x^4-2x^3+3x^3-8x$
$\left(x^2\:+\:x\:-\:3\right)\:\left(x\:+\:2\right)\:$
$\frac{x^3+6x+7}{x}$
$cos\left(2x-50\right)=0.91$
$\arctan\left(y\right)=\frac{1}{2}x^2+x+c$
$\frac{8a^3-44a^2+44a+42}{4a^2-8a-5}$
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