$\int\:\frac{x^3+x^2+2x+1}{x^4+3x^2+2}dx$
$0.34210526315789475\:-\:1$
$k^2-5k+8$
$\frac{\left(x^6y^3\right)^{\frac{-1}{3}}}{\left(x^4y^2\right)^{\frac{-1}{2}}}$
$\frac{1}{5}+\frac{4}{5}$
$x^2+x-30=0$
$\frac{dy}{dx}xlnx=2y$
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