$-2\left(-7+\right)+53$
$9x\left(4x-5x+3\right)-6x$
$\log_x\left(27\right)+\log_x\left(9\right)-\log_x\left(3\right)$
$\left(2m-na2\right)^2$
$\int\frac{2x+1}{x\left(x-2\right)\left(\:x+3\right)}dx$
$\left(3m-n^{-1}\right)^3$
$8x^2+7x-6$
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