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Simplify $$2 \sin^2 \left(\frac{\pi}{4} - \frac{x}{2} \right)+\sin(x)$$.
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2\left(\sin\tfrac{\pi}{4}\cos\tfrac{x}{2} - \cos\tfrac{\pi}{4}\sin\tfrac{x}{2}\right)^2 + \sin x\text{Simplify: }\:2\sin^2\left(\frac{\pi}{4}-\frac{x}{2}\right) + \sin x