$\frac{cos\left(a\right)cot\left(\frac{\pi}{2}-a\right)}{sin\left(a\right)}$
$\int\frac{1}{x\sqrt{49+x^2}}dx$
$\left(3m^3-5h\right)\left(3m^3+5h\right)$
$\left(-3.4\right)\left(-2\right)$
$\frac{d}{dx}4xy^2-4x^2=10$
$17-10n=-10n+17$
$\frac{dy}{dx}=e^{3t}$
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