$\frac{sinx-1}{1+sinx}-\frac{1+sinx}{sinx-1}$
$\left(a^n-2b\right)^3$
$\frac{\sqrt{x^2+x-20}+3\sqrt{x-4}}{x-4}$
$4x\:+\:4\:+\:12\:-\:x$
$\int\frac{2x^2+x+7}{\left(2x-1\right)\left(x-1\right)\left(x+3\right)}dx$
$\log_{36}n=\frac{3}{2}$
$3\left(a^2\right)^2-\left(6b^2\right)^2$
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