A) 63-04- D) (*4) - ( —25 ) -
c) ( - 48d - ( -52) =
d) I - 4 ) - ( 12 ) =
e) 6S - 21 - ñ4 ) + ( 7 - 72 ) =
I) ( 24 - 89 + 18 ) ( - 91 + 24 ) =
g) ( - 417 - 78 ) ( - 518- 287 ) =

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