$3\cdot\left|9\cdot\left(-5\right)\right|-7$
$\int\frac{9}{x^2\:-\:9}dx$
$-\left(\left(m+n-5\right)^2\right)+2\left(m+1\right)^2+2\left(n-4\right)^2$
$x^2y+2y=5x$
$3x+11<-2$
$-33-1-17-10$
$8x=56$
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