$3x-4y=2$
$5x^2+45x+90$
$\int\frac{2}{2x^2-x}dx$
$\int\frac{\sqrt{x^2}^{-36}}{x^2}\:dx$
$\frac{\left(x^{\frac{7}{2}}-x^2\right)}{x+1}$
$25-\left|-4-\left(-5-8+\left(-11-7+10\right)-9\right)+6\right|$
$\:20\:.\:2\:.\:22\:.\:23\:$
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