(531/135+579/357+753/975)*(579/357+753/975+135/531)-(531/135+579/357+753/975+135/531)*(579/357+753/975)=(要写过程
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![(531/135+579/357+753/975)*(579/357+753/975+135/531)-(531/135+579/357+753/975+135/531)*(579/357+753/975)=(要写过程](/uploads/image/z/8383260-12-0.jpg?t=%28531%2F135%EF%BC%8B579%2F357%EF%BC%8B753%2F975%29%2A%28579%2F357%EF%BC%8B753%2F975%EF%BC%8B135%2F531%29%EF%BC%8D%28531%2F135%2B579%2F357%EF%BC%8B753%2F975%EF%BC%8B135%2F531%29%2A%28579%2F357%EF%BC%8B753%2F975%29%EF%BC%9D%28%E8%A6%81%E5%86%99%E8%BF%87%E7%A8%8B)
(531/135+579/357+753/975)*(579/357+753/975+135/531)-(531/135+579/357+753/975+135/531)*(579/357+753/975)=(要写过程
(531/135+579/357+753/975)*(579/357+753/975+135/531)-(531/135+579/357+753/975+135/531)*(579/357+753/975)=(要写过程
(531/135+579/357+753/975)*(579/357+753/975+135/531)-(531/135+579/357+753/975+135/531)*(579/357+753/975)=(要写过程
(531/135+579/357+753/975)*(579/357+753/975+135/531)-(531/135
+579/357+753/975+135/531)*(579/357+753/975)=(531/135+579/357+753/975)*(579/357+753/975+135/531)-(531/135
+579/357+753/975)*(579/357+753/975)-135/531*(579/357+753/975)=(531/135+579/357+753/975)*(579/357+753/975+135/531-579/357-753/975)-135/531*(579/357+753/975)=(531/135+579/357+753/975)*135/531-135/531*(579/357+753/975)=135/531*(531/135+579/357+753/975-579/357-753/975)=135/531*531/135=1
或者
令X=579/357+753/975,原式=(X+531/135)*(135/531+X)-X*(X+531/135+135/531)=x2+x*(531/135+135/531)+1-X2-X*(531/135+135/531)=1