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Ответ:

[tex] - 14 \times 2.3 - 14 \times6 .7 + 18 \times 9 = \\ = - 14(2.3 + 6.7) + 2 \times {3}^{4} = \\ = - 14 \times {3}^{2} + 2 \times {3}^{4} = \\ = {3}^{2} (18 - 14) = 9 \times 4 = 36[/tex]