$x^2+7x=0$
$\log\left(4x+4\right)-1=1$
$\sqrt{x}2\:+\:13\:=\:2x\:-\:5$
$6\left(x+y\right)^2-6x^2$
$\int z^2\cos\left(2x^3\right)dz$
$15x^2y+5x$
$3\left(x+\frac{1}{2}\right)$
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