$xy-3y+4x^2=7$
$7x^3-7x$
$x-6>-15$
$\frac{sin^2x-tan^2x}{tan^2xsin^2x}$
$\left(5x^2\:y^3\:z\right)^2$
$\frac{dy}{dx}\left(y\:=\:ln\:\left(e^{-x}+\:xe^{-x}\right)\right)$
$\frac{\left(x^2+4x+4\right)}{\left(x^2+4x+3\right)}$
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