$81^4-126a^2+49$
$22m^2-352\:m+256$
$\int_1^2\frac{x^3}{\sqrt{x-1}}dx$
$e^n\frac{1}{n^3}\left(x-4\right)^n$
$-3x^2-6x+12=0$
$\:\frac{4x^3+8x^2-x-2}{2x+1}$
$\int_0^{\infty}\left(\frac{1}{x^{0.99}}\right)dx$
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