$\int\:\:\left(ctg\:x\right)dx$
$\left(\left(\left(2\right)^2\right)^2\right)^{-3}$
$\frac{\sin\left(x\right)+2\sin\left(x\right)\cos\left(x\right)}{\cos\left(x\right)}$
$1+\cot^2\left(-a\right)=\csc^2a$
$-4x^2-28-48$
$\lim_{t\to-1}\left(\frac{\sqrt{t}}{t^2-t-2}\right)$
$\left(10y^3+7\right)^2$
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