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tìm nguyên hàm của hàm số f x x 2 1
nguyên hàm 1 x 2+1
1x 2 nguyên hàm
nguyên hàm 1e x
nguyên hàm 11+x 2
nguyên hàm ln x x
nguyên hàm ln x+1
nguyên hàm 1 e x+1
nguyen ham 1x 4 + 1
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