$\int\frac{9}{\sqrt{2x+9}}dx$
$\lim_{x\to2}\left(\frac{x+2}{x^2}\right)$
$\int5x^3\left(4x^4+1\right)^4dx$
$-1076-860$
$x^3+9x^2+26x+24$
$81m^2+90m+25$
$\left(a+b\right)\left(a^3-b^3\right)+\left(a-b\right)\left(a^3+b^3\right)$
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