$\lim_{x\to5}\left(x^4+8x^3+2x^2\right)$
$803.25+650.94+34.876$
$\int\left(3x^2+7x\right)\ln\left(x\right)dx$
$4x^2=21y^2$
$\int\tan^5\frac{x}{2}dx$
$-1<\frac{3-7x}{4}$
$\left(x^2-1\right)\left(x+3\right)$
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