$\tan^2x\:sec\:x\:=\:cos\:x$
$12a-12b$
$100+50+d^2$
$\left(y+9\right)\left(y-8\right)$
$\frac{2}{5}x^2y^3+\frac{x^{\frac{1}{2}}}{y}\left(\frac{3}{2}\right)+5;\:x=4;\:y=3$
$\csc^2x-4\cot x-2$
$32x^3-12x$
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