$2b^2+11b+12$
$\left(\frac{3}{4}x-5\right)\left(\frac{3}{4}x+5\right)$
$\frac{x^2-4}{x-2}=0$
$\cos\left(x\right)^2-2\cos\left(x\right)=-1$
$\left(\sin x-\cos x\right)\left(\csc x+\sec x\right)$
$\frac{x^2\sqrt{x}+\sqrt{x}}{x+5}$
$\frac{26x^6-8z^6}{3x^2-2x^2}$
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