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nguyên hàm sin 4 x
nguyên hàm sin 3 x
nguyên hàm sin 2 x
nguyên hàm của sin 4 x
sin 2x nguyên hàm
nguyên hàm sin 2 2x
nguyên hàm sin x
nguyên hàm 1sin 2x
nguyên hàm 1sin 2
nguyên hàm 1x 3
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