$f^2+20+100$
$\frac{10x+4-6x^2}{x+2x^2-2}$
$\lim_{x\to0}\left(\frac{x^2+561x}{11\sin\left(x\right)}\right)$
$\int\frac{4x^2}{\sqrt{81-x^2}}dx$
$\trm\left(\frac{1+1}{2x}\right)^{-2}$
$x^2-10=7$
$\left(1+r\right)\cdot\left(1-r\right)$
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