Ответ:
(84²+34²/2 - 34×84)×1/135²-35²
(84²+34²/2 - 2856)×1/(135-35)×(135+35)
(84²+34²/2 - 2856)×1/100×170
(84²+34²/2 - 2856)×1/17000
84²+34²/34000 - 21/125
7056+1156/34000 - 21/125
8212/34000 - 21/125
5/68
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Ответ:
(84²+34²/2 - 34×84)×1/135²-35²
(84²+34²/2 - 2856)×1/(135-35)×(135+35)
(84²+34²/2 - 2856)×1/100×170
(84²+34²/2 - 2856)×1/17000
84²+34²/34000 - 21/125
7056+1156/34000 - 21/125
8212/34000 - 21/125
5/68