请用简便方法算一下这道分式计算题,1/(x+1)-1/(x+2)-1/(x+3)+1/(x+4)=?

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请用简便方法算一下这道分式计算题,1/(x+1)-1/(x+2)-1/(x+3)+1/(x+4)=?
请用简便方法算一下这道分式计算题,
1/(x+1)-1/(x+2)-1/(x+3)+1/(x+4)=?

请用简便方法算一下这道分式计算题,1/(x+1)-1/(x+2)-1/(x+3)+1/(x+4)=?
（4x+10）/(x+1)(x+2)(x+3)(x+4)