$8a^3-2$
$\frac{4x^3-3x^2+x+1}{x+1}$
$2\cdot\:-9+3\left(20-6-4\right)$
$\frac{-2}{3}x+x$
$-2\cdot sin\left(x\right)^2-cos\left(x\right)+1$
$3x\cdot3x+6y$
$43+51+65-94+12-86$
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