$\int\frac{3x^2+2x+3}{x\left(x^2+9\right)}dx$
$x^2+9x=-14$
$p^2-36$
$\left(3x+2y\right)\left(3-2y\right)$
$121y^2+22yz+z^2$
$8\cdot3.20$
$8p+10q-20r-18p+23q+15r$
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