$-\sin\:\left(x\right)-\cos\:\left(x\right)\cot\:\left(x\right)=-\csc\:\left(x\right)$
$\left(-3-a\right)^2$
$\sqrt{2a}.\sqrt{14a^3}.\sqrt{5a}$
$10x^2y-15xy^2+25x$
$\left(3ab+4c\right)\left(3ab-4c\right)$
$13-\left(-27-19\right)$
$\int_3^3\left(\mathrm{sech}^2x\tanh^5\right)dx$
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