$\int\frac{1}{\left(s^2+a^2\right)^2}dx$
$2x^2+4y=5$
$a^3-a^2-7a^2b+9ab^2$
$13x\:+\:2\:=\:41$
$2xy\:+\:x^3y$
$\left|-1\right|+\left|-1\right|$
$\frac{4x-5}{2}$
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