$\left(\frac{13}{7}+\frac{1}{2}\right)^2$
$3\:=\:\frac{g\:-\:60}{7}$
$\frac{-3}{g}\cdot\frac{12}{100}$
$\frac{x^2+15-5}{-x+3}$
$-15\cdot24$
$\frac{3}{n+\sqrt{7}}$
$\left(3x^2-5x+4\right)+\left(2x^2-7\right)$
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