$\int arctan\left(9t\right)dt$
$4k^2+4k=5$
$s^3-s^2+s$
$\frac{\:9.33262154439441e+155}{650}$
$x^2-1x+.5$
$\left(-6-4\right)\:\left(-12-4\right)$
$x^2=-x$
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