(1+92+35)× (92+35+47)-(1+92+35+47)× (92+35)

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(1+92+35)×(92+35+47)-(1+92+35+47)×(92+35)(1+92+35)×(92+35+47)-(1+92+35+47)×(92+35) (1+92+35)×(9

(1+92+35)× (92+35+47)-(1+92+35+47)× (92+35)
(1+92+35)× (92+35+47)-(1+92+35+47)× (92+35) 

(1+92+35)× (92+35+47)-(1+92+35+47)× (92+35)
令92+35=a
则原式=(1+a)(a+47)-(1+a+47)a
=(1+a)a+47(1+a)-(1+a)a-47a
=47(1+a)-47a
=47+47a-47a
=47