$2\left(n+3\right)=2n+3$
$\frac{m^{-5}n^8p^{11}}{mp}$
$\frac{8a^5\:+\:18a^2\:+\:6}{x\:+\:2}$
$-\frac{1}{2}\pi$
$\csc a-\cot a\csc a+\cot a$
$\frac{-9x+27}{x^{\left[2\right]}-4x-5}$
$x^2+1+49$
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