$csc\left(\left(csc\left(x\right)\:-\:1\right)\right)\:=\:2$
$2b+2c$
$5+5+1$
$100x^2-25=0$
$\left(a-3\right)\left(b+5\right)$
$\frac{3y-z}{3x+z};\:x=4;\:y=8;z=-3$
$4\cdot3\left(5+2\right)+\left(3\cdot9\right)$
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