$\frac{x+1}{5}=\frac{3x-9}{3}$
$x^2-8x$
$121x^2-132x+36=0$
$\left(-2b+3b\right)^2$
$\int\left(2x-\frac{1}{x}\right)^2dx$
$\frac{3}{2}\:\frac{4}{3}$
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