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5·(-3)^3 / 392 - 15·(-3)^2 / 196 - 45(-3) / 56 + 5·(7)^3 / 392 - 15·(7)^2 / 196 - 45(7) / 56 =
5·(-3)^3 / 392 - 15·(-3)^2 / 196 - 45(-3) / 56 + 5·(7)^3 / 392 - 15·(7)^2 / 196 - 45(7) / 56 =
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