а) 10a^3 - 40a^2 +20a
б) 2b * (-6b^3 + 2x^2 - 1) = - 12b^4 + 4b^3 - 2b
в) 10c^6 - 0.5c^5
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а) 10a^3 - 40a^2 +20a
б) 2b * (-6b^3 + 2x^2 - 1) = - 12b^4 + 4b^3 - 2b
в) 10c^6 - 0.5c^5