$-22-\:\left(-8\right)$
$\csc\left(x\right)^2-1\cdot\tan\left(x\right)^2+1$
$\:-\:\left(-\:12+8-3+\:6\right)\:\:\:$
$34-18+25-23$
$\left(\frac{1}{x^3-2x+1}\right)^3$
$9m^6-36n^3$
$\int\frac{x}{\left(4x^{2\:}-4\right)^2}dx$
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