$\frac{x-7}{x+2}=\frac{x}{x+2}$
$2x^2+8x-12=0$
$\int_0^2\left(\frac{x^2+1}{x-3}\right)dx$
$-6x\:-32\:+8x\:-14$
$6x^2-y^2=5$
$cos\left(x+70\right)=-\frac{1}{2}$
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