Хэлпп!!!!!!!!!!!!!!хэлп

Question

Хэлпп!!!!!!!!!!!!!!хэлп

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Answer 1

1) 68X68 - 43X39 = 4624 - 1677 = 2947
2) 91X79 - 52X52 = 7189 - 2704 = 4485
3) (1001 - 999)X(1001 - 999)X(1001 - 999)X(1001 - 999)X(1001 - 999) + 86 = 2X2X2X2X2 + 86 = 118
4) 591 - (802 - 799)X(802 - 799)X(802 - 799)X(802 - 799) = 591 - 81 = 510