$\int\left(x^2\sqrt{\left(2x^3+9\right)}\right)dx$
$\left(1+sec\right)\left(1-sec\right)$
$x^2+9x^2+9$
$-8+\left(4\cdot7\right)-3+5$
$\frac{du}{dx}=\frac{\sqrt{1+u^2}}{x}$
$\int\frac{\sqrt{x^2+5}}{x^2}dx$
$\left(9x^2+3x-40\right)\left(9x^2+12x+4\right)$
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