$\left(2x+7\right)\left(3y\right)$
$-9\cdot\left(-7.3\right)$
$\left(-2\right)^n\frac{\left(2\right)^{n+1}}{\left(-2x+2\right)^{2n+2}}$
$x=-1,\:w=-2$
$x+-3\left(4+-1x\right)+2$
$\int\frac{x^2-1}{\left(x^2+2x+1\right)^2}dx$
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