$2mx^4+3nx^4+10m+15n$
$10x+q+3+5x+qx$
$\lim_{x\to+\infty}\left(\frac{x^2-2x+5}{x\sqrt{x^2+1}}\right)$
$\int\:5x^2e^{5x^3}dx$
$\frac{d}{dx}\left(\ln\left(x\right)+x^2\right)$
$25+19-5\left(108-107\right)-28+7$
$\int_0^1\left(\frac{1}{1+18x^2}\right)dx$
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