$\int\:\frac{x+1}{\sqrt{x^2+2x+5}}\:dx$
$tanx\sqrt{1-sin^2x}=sinx$
$\left(-5\right)x\left(+38\right)$
$\lim\:_{x\to\:0}\left(x\:cot\:\pi\:\:x\right)$
$x^2-7x+5\:x$
$-116\left(m+n\right)^2t^4+100\left(m+n\right)^4+25y^8$
$m^4-10m^2+25$
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