$\frac{x^2-3x+2}{2x+4}$
$5x+2y=7$
$-2+4cos^2x+7cosx=0$
$9^3\cdot3^3$
$\ln\left(x\right)\left(x-1\right)^2$
$5x^2-y^3=-7$
$x-10+9x-3$
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