$\sqrt{245}$
$\int\frac{x^2+1}{x^3-2x^2+x}dx$
$3a^59$
$\lim_{z\to0}\:\frac{z^2-5z-4}{z^2+1}$
$\int_1^{\infty}\left(\frac{2e^{3k}}{1+e^{6k}}\right)dx$
$y=\frac{1}{5}\left(x^2+3\right)^5$
$2x^2+7+3$
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