$\lim_{x\to-4\left(2x^3-3x^2\right)}2$
$7\cdot27$
$7x^2+2x-14=0$
$\left(5-\left(3b-a\right)\right)^2$
$4x\left(x+2\right)-3\left(x-5\right)$
$\int cot\left(2x+5\right)dx$
$\lim_{x\to a}\left(\frac{\cos\left(x\right)-\cos\left(a\right)}{3x-3a}\right)$
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