$\left(5bx-1\right)^2$
$5\sqrt{-1}$
$2 x ^ { 2 } + 3 x + 1 = 0$
$6x-4<2x+3$
$3\:csc^2\:w+16\:csc\:w+5$
$\frac{50}{35.27}$
$\frac{x^2-4x-45}{x-81}$
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