$-45.\:-56$
$x^2-28x+-14$
$3^{-4}\cdot3^{-1}\cdot3^6$
$\:4\:\:-\:\:6\left(-4m\:\:+\:\:9\right)\:+\:7m$
$b^2a+b^3+b^2a+b^3+ba^2-b^2a+a^3-a^2b$
$-51x\:-\:1$
$w-3.31=8.2$
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