$2b^2a+b^2a+3x^2y-x^2y$
$\sin\left(\frac{\sqrt{7}}{6}\right)^2+\cos\left(x\right)^2=1$
$-x^2-2x$
$\frac{x}{x^{2}+7x+12}\cdot\frac{x+3}{x+4}$
$2x+3=1$
$9+5^3$
$\left(\tan x-1\right)\left(\sec x-1\right)=0$
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