A=61 ,b=62,c=63,x=93,y=102, then 63a+63b-63x-63y+93a+63-74y+52x-1020c
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-65772
Step-by-step explanation:
63(61)+63(62)-63(93)-63(102)+93(61)+63-74(102)+52(93)-1020(63)
3843+3906-5859-6426+5673+63-7548+4836-64260
-65772
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