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[" 14) (a)fr "x=(8^(@)-7n-1," ne "N" ) a...

[" 14) (a)fr "x=(8^(@)-7n-1," ne "N" ) and "y=(49n-49,pi in M)" then "],[" (i) "Xev" (b) "vex" (c) "x-y" (a) "x" ny "=4]

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