$\frac{\csc\left(a\right)}{\tan\left(a\right)+\cot\left(a\right)}=\cos\left(a\right)$
$\left(\frac{7zc^4}{y}\right)^2$
$-8^3$
$q+80ln\left(2p\right)$
$5xyz^3-3xy^3z+2x^3y\:z\:$
$2cos\left(x\right)=-18cos\left(x\right)-10$
$\frac{108}{2}$
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