$\left(x^2-5x+1\right)\cdot\left(2x-3\right)$
$3x^2\cdot\left(7x^5\right)^2$
$2x^3-x^2+x$
$\left(\frac{7}{2}b\:-\:3\right)\:\left(8\:+\:6b\right)$
$\frac{x-1}{2x+6}+3\le0$
$q^2\:+\:r^2\:-\:2q^2\:-\:r^2\:-\:4qr$
$-2.22+11.11-\left(-0.8\right)$
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