数学大神求解啊
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原式
={[(x+1)/(2x-2)-(x+3)/(2x+2)]-6/(x^2-1)}(4x^2-x)/3
={(1/2)[(x+1)^2-(x+3)(x-1)]/(x^2-1)-6/(x^2-1)}(4x^2-x)/3
={(1/2)[(x^2+2x+1)-(x^2+2x-3)]/(x^2-1)-6/(x^2-1)}(4x^2-x)/3
=[2/(x^2-1)-6/(x^2-1)](4x^2-x)/3
=(4x-16x^2)/(3x^2-3)
={[(x+1)/(2x-2)-(x+3)/(2x+2)]-6/(x^2-1)}(4x^2-x)/3
={(1/2)[(x+1)^2-(x+3)(x-1)]/(x^2-1)-6/(x^2-1)}(4x^2-x)/3
={(1/2)[(x^2+2x+1)-(x^2+2x-3)]/(x^2-1)-6/(x^2-1)}(4x^2-x)/3
=[2/(x^2-1)-6/(x^2-1)](4x^2-x)/3
=(4x-16x^2)/(3x^2-3)
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