$\sin^22x=0.25$
$\frac{dy}{dx}=\frac{x}{9y}$
$\left(10x^6+4x^4\right)-\left(6x^6-8x^4\right)$
$\frac{\left(2b-2\right)}{2}+\frac{2b}{5}$
$\frac{\sqrt{x}+\sqrt{-2}}{\sqrt{x}-\sqrt{-2}}$
$4\:-\:20:\left(-5\right)$
$4yx\cdot\frac{dx}{dy}=x^2+1$
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