$42x^2+30y^2-10=0$
$\lim_{x\to16}\left(\frac{4x}{4-\sqrt{2x-16}}\right)$
$\frac{-12y}{3}-\frac{18}{3}$
$\left(a^3-a+2a^2+1\right)\left(a^2+a^3-2a-1\right)$
$\int-5e^{14k}dk$
$-5\left(2x-1\right)$
$\frac{4x^3+4x^2-4x+2}{2x^2-x-1}$
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