$64x^2-49m^4$
$16w^{2}-81m^{2}$
$4x\:+\:5\:=\:3x\:+\:8$
$\sqrt{3\cos\left(x\right)+1}=2$
$\frac{36+2x}{x^2-3x-40}$
$\left(1-e^x\right)^4$
$\frac{dy}{dx}+3x+\frac{4y}{x}=0$
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