$\sec\left(y\right)^2-\tan\left(y\right)\sec\left(y\right)=\frac{1}{1+\sin\left(y\right)}$
$20abc+12abc$
$\left(76\right)\cdot\left(-342\right)$
$7\:^3\:\left(\:-\:77\:\right)\:$
$343m^{3}n^{6}-216z^{3}$
$26x^2-36y^2$
$50^0$
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