求不定积分x/(x+3) dx、x²/(x+3) dx

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求不定积分x/(x+3) dx、x²/(x+3) dx
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求不定积分x/(x+3) dx、x²/(x+3) dx
求不定积分x/(x+3) dx、x²/(x+3) dx

求不定积分x/(x+3) dx、x²/(x+3) dx