$7t\frac{dq}{dt}-3\left(lnt\right)q=0$
$-1\left(-3\right)\left(-9\right)$
$-\left(-3\right)\left(-8\right)-\left(2\right)\left(7\right)\left(-12\right)+\left(-3\right)\left(-5\right)\left(-9\right)-3$
$\left(x+2\right)\:\left(x-7\right)$
$\left(2x^2+\sqrt{x}\right)\left(2+y\right)$
$\lim_{x\to\frac{\pi}{3}}\left(\frac{sinx-cos2x}{cosx}\right)$
$\int\frac{2x^2+3}{\left(x^2+4\right)\left(x-1\right)}dx$
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