2(a-b)的5次方÷(b-a)的4次方+(-a-b)的3次方÷(a+b)²
=2(a-b)的5次方÷(a-b)的4次方-(a+b)的3次方÷(a+b)²
=2(a-b)-(a+b)
=2a-2b-a-b
=a-3b
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=2(a-b)的5次方÷(a-b)的4次方-(a+b)的3次方÷(a+b)²
=2(a-b)-(a+b)
=2a-2b-a-b
=a-3b
2(a-b)^5÷(b-a)^4+(-a-b)^3÷(a+b)²
=2(a-b)^5÷(a-b)^4-(a+b)^3÷(a+b)²
=2(a-b)^(5-4)-(a+b)^(3-2)
=2(a-b)-(a+b)
=2a-2b-a-b
=a-3b