$\frac{3}{4}x^2-\frac{1}{8}x^2$
$\int\left(\frac{7x^2}{81+x^2}\right)dx$
$\int\sqrt[n]{x}dx$
$2x+y=-8$
$\left(5x-7\right)\left(5x+9\right)$
$x^2-2x-152$
$7a+10b-9a-b$
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