$m^4-14m^2+49$
$\frac{n^6+1}{n^2-1}$
$x^3y^{3-8}$
$19\sin x=6\cos^2x-14$
$\lim_{x\to0}\left(\ln\left(x\right)x^k\right)$
$\int_0^{\infty}\left(\frac{45}{1+x^2}\right)dx$
$-14x^2+23x-3$
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