$\frac{dy}{dx}=14x\left(x^2+1\right)^6$
$x^2+15x+50$
$\frac{\sin\left(x\right)+2\sin\left(x\right)\cos\left(x\right)}{\frac{1}{\cos\left(x\right)}+2}$
$4q-10r$
$6x^2+12x$
$\lim_{x\to-\infty}\left(2x+\sqrt{4x^2-3x}\right)$
$\left(12b^4\right)^2$
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