$x^2+7+12$
$x^2+14x-5=0$
$\frac{5}{x+3}<2$
$ax^2+bx=0$
$\log_x\left(y-18\right)=2$
$\frac{24}{2x}$
$\left(3m+2n\right)\left(6m-4n\right)=18m^2-8n^2$
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