$\frac{-x-1}{\sqrt{2x^2-x^2}}$
$\left(a-2b+2c\right)^2$
$\frac{d}{dx}3x^2y-xy^2+y^3=0$
$\frac{cos2x}{sin4x}=\frac{1}{2}cosec2x$
$8x^2+y^2=10$
$\left(x+1\right)\cdot6\left(x-1\right)$
$csc^2x-4=0$
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