$9t^2-49$
$12-7-1\left(-8\right)$
$\lim_{x\to0}\left(\frac{e^{4x}-1}{2x^2+2x}\right)$
$\frac{2-x}{x+3}>-2$
$\int\frac{\sqrt{\left(9x^2+25\right)}}{3x}dx$
$\int\frac{\sqrt[3]{x}-3}{2x^{2\:}}dx$
$\frac{dy}{dt}=y\left(1-\frac{y}{40}\right)-10$
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