$\int2x\left(x^2-7\right)^4dx$
$10r^{-3}w^{4}$
$-617-\left(+352\right)-\left(-323\right)-\left(-839\right)+\left(+372\right)$
$\left(-3\right)^6\cdot4^3\cdot\left(-3\right)^8$
$-20=8$
$a^2-16-x^2+36+12a-3x$
$\left(172.8\right)\left(0.05\right)^2$
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