$\frac{1}{x^4+5x^2+4}$
$\left(-30\right)\:\left(-3\right)$
$\left|\left(x-2\right)^2+7\right|\left|\left(x-2\right)^2-6\right|$
$x^2\le36$
$\int15x^{\frac{1}{2}}dx$
$6x^2+7x-24$
$9b+15=4b-10$
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