$14xy+10x+42y+30+14xy-12x+42y-36$
$f\left(x\right)=\frac{1}{\left(1+x\right)^2}$
$m^2+2mn+n\:^2-1$
$\left(3x-8\right)\left(4x+2\right)$
$\lim_{x\to-5}\left(\frac{4\left(2x+3\right)^2-196}{x+5}\right)$
$\frac{1}{19}x^2\frac{4}{35}x+\frac{4}{35}$
$\int\:\frac{4x^2+3x+6}{x^2\left(x^2+3\right)}dx$
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