$n2\:+\:14n\:+\:49$
$\int x\left(4y^2+2y\right)dy$
$2a^2=a+1$
$-\frac{xy}{3}+\frac{5xy}{6}+\frac{9xy}{2}$
$x^3y^5\left(3x^2y\right)$
$40x^3+135y^6$
$\lim_{x\to-2}\left(\frac{x+2}{\sqrt{x+3}-1}\right)$
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