$\int_0^{in4}\frac{e^t}{\sqrt{e^{2t}+9}}dt$
$x^2+0.000018x-0.000018$
$x+5\le-2$
$\left(xy^2+5x^2y-4\right)^2$
$x^2-7x-12=0$
$3\:.\:3$
$\int a^4dx$
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