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∫ 1 cos x−a cos x−b
∫ 1 cos x−a cos x−b d�
∫ cos x 2 dx
cos x-a cos x-b
cos -1 xa + cos -1 yb
∫ cos 2x dx
∫1cos 2x
int 1cos x-a cos x-b
∫ sin x in cos x dx
cos x+a
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