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Select the expression equivalent to:

$$\sin⁡θ+\cosθ-\cfrac{1}{\sin⁡θ+\cosθ}$$

A

$0$

B

$-1$

C

$2\sinθ\cos⁡θ$

D

$\cfrac{\sin(2θ)}{\sinθ+\cosθ}$

E

$\sin^2⁡θ+\cos^2⁡θ$

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