$k^2+8k+16=0$
$\left(\frac{t-2}{4-2}\cdot\frac{t-2.5}{4-2.5}\right)$
$x+3y+2z=2$
$\int\:x^2\left(x-\frac{2}{x}\right)dx$
$9\left(1+8s\right)+3s+8$
$\int r^2\left(\frac{r^3}{15}+3\right)^4dr$
$b2+10b+25$
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