$\frac{cos^2x}{1-sinx}=\frac{\left(cscx+1\right)}{cscx}$
$\left(m^2+2n^2\right)^2$
$-2.5\left(6x-4\right)+16x$
$12+55+7+-15+-6$
$x^{3\:}-3x^2+5x-6$
$\left(-11-a\right)^2$
$3w^2-5w$
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