$tan\left(arctan\left(x\right)+1\right)$
$\lim_{x\to1}\left(\frac{xsin\left(x-1\right)}{x^3-x^2-x+1}\right)$
$\:f\left(x\right)\:=\:2\cdot2^3-3$
$y'=1-7x^2$
$\left(8b^5+6bc^3\right)^3$
$\frac{1}{2cosxsinx}$
$\left(\:x\:-\:0.9\:\right)\left(\:x\:+\:4.2\:\right)$
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