$3\left(y-1\right)^2+2\left(y-1\right)-5$
$456\:+\:1$
$\frac{1}{3}x+\frac{1}{2}y=7$
$\left(3x^2+5x-2\right)-\left(x^2-8\right)$
$19b^3\:\left(ab\:+\:3a^2-4a\right)$
$2\left(x\cos a-y\sin a\right)\left(x\sin a+y\cos a\right)$
$\lim_{x\to4}\left(\frac{y+2}{\sqrt{y+3}-1}\right)$
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