87 * 43 + [ (87^3 - 43^ 3) / 44 ] как рационально решить?
87-43=44
87*43+87*43=2(87*43)
(87^2+87*43+43^2)=(87+43)^2-2(87*43)
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87-43=44
87*43+87*43=2(87*43)
(87^2+87*43+43^2)=(87+43)^2-2(87*43)