$x^3+6x^2+5x+4x^2-x+5$
$\frac{n-1}{\sqrt{n}-1}$
$-144\::\:36$
$\frac{9^8}{9^{-6}}$
$3\csc^2x$
$\sqrt[3]{x^4}+\sqrt[3]{8x}$
$30\:\cdot\:3\:-\:\frac{15}{3}\:+\:\left(12-3\right)\:\cdot5$
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