$-2m=16$
$\left(x^3+8x^2+11x-20\right)-\left(3x+x^2-4\right)$
$\left(-93\right)-\left(-45\right)$
$9-\left(x\right)=7$
$8x^2y^3\cdot x^4y^4$
$-3^2+\left(2-6\right)\left(10\right)$
$8-10-3+11-1$
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