$-\frac{184}{+2}$
$\left(x-2y+2\right)\left(-3x+y-1\right)$
$-\left(a+5\right)^2$
$\left(x^3\:+\:15\right)\:\left(x^{2\:}-\:9\right)$
$\int r\cdot2^rdr$
$9\cot^2x-16=0$
$8.6x+2.2\left(2x-5\right)=54$
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