$\left(\:b\:\:+\:\:\:3\right)\:\:\left(b-\:\:1\right)$
$5x^2-26x+5$
$\left(6\right)^2-1$
$13x-6y-14x-2y+x+y$
$y^{'\:}+5=2x^2$
$\left(4\left(2t^2+2t\right)\right)\left(2t+1\right)^2$
$-355\:+\:-350$
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