$\frac{a^2b^2}{a^{-3}b^{-1}}$
$kx^2+\left(k+1\right)^2x\:+k+2$
$3a^2b^2+9a^3b$
$-\:18\:+\left\{-\:2\:-\:\left[9-3\right]\right\}\:$
$-5+x<17$
$-2\left(a+3\right)+2a$
$\left(4a^2-2ab+9b^2\right)x\left(7a^2+5ab-2b^2\right)$
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