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=6a(1/3a^2-0.5b)-12b(-0.25a+1/3b^2)-ab=
=2a^3-3ab+3ab-4b^3-ab=
=2a^3-4b^3-ab
6a(1/3a² - 0,5b) - 12b(-0,25a + 1/3b²)-ab =
=2a³ - 3ab + 3ab - 4b³ -ab = 2a³-4b³-ab
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=6a(1/3a^2-0.5b)-12b(-0.25a+1/3b^2)-ab=
=2a^3-3ab+3ab-4b^3-ab=
=2a^3-4b^3-ab
6a(1/3a² - 0,5b) - 12b(-0,25a + 1/3b²)-ab =
=2a³ - 3ab + 3ab - 4b³ -ab = 2a³-4b³-ab