$\frac{1+\tan\:\theta}{1-\tan\:\theta}+\frac{1+\cot\:\theta}{1-\cot\:\theta}=0$
$\left(m-3x\right)^3$
$t^2+5t-24$
$\left(7a+2\right)^2$
$\sqrt[3]{1}+3$
$\frac{81a^4-16b^4}{3a-2b}$
$11=x\cdoty^{2}\cdote^{-3y}+5\en\left(x\cdoty^{2}\right)=0$
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