$n\left(\frac{56}{86}\right)^{n-1}$
$\int\:x^2\sqrt{x^3+31}dx$
$\int\sqrt{342-9x^2}dx$
$36x^2-24xy^2+4y^4$
$\frac{d}{dx}4x^3+5x^2+8x$
$\int\frac{x^2}{\sqrt{4-x\:}}dx$
$4x^2+12x+3$
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