$\frac{7x}{x^2+6x+9}+\frac{1}{x^2-9}$
$-1+1^5+1$
$x\frac{2}{3}y\frac{1}{4}z\frac{2}{5}$
$\int_5^{\infty}\left(\frac{\log\left(9x\right)^8}{x}\right)dx$
$-630:-18$
$9x^2-18x+6$
$\left(3x^3-2x^2-x\right)\left(\left(3x^3+2x^2-x\right)\right)$
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