$\cot^2x=\csc^2x-1$
$-20ab+11+6ab$
$\frac{5\cos\left(x\right)}{\sin\left(x\right)}=5\cot\left(x\right)$
$9\left(x-5\right)+32=9x-13$
$2x^5-3x^2+6x$
$a4\:\:+1a^2\:\:\:+\:1$
$\sqrt[16]{x^{12}y^4}$
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