$\sqrt{x}2\:+\:13\:=\:2x\:-\:5$
$7z^2y-12zy^3$
$w^2-8w+16=0$
$-2\cdot1^2-4\cdot1+6$
$\int\left(\frac{7}{\left(7x-9\right)^4}\right)dx$
$\log\left(y+1\right)+\log\left(y\right)=\log\left(y+9\right)$
$\sqrt{2}\sec\left(x\right)=2$
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