Ответ:
72x-3xy(z+y) = 72x-3xyz-3xy^2
(3y-4z)^2 = 9y^2-24yz+16z^2
(2y+3)^2*2x = (4y^2+12y+9)*2x = 8xy^2+24xy+18x
5-(3x+2)+(3x-3)-(4x-3) = 5-3x-2+3x-3-4x+3 = 3-4x
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Ответ:
72x-3xy(z+y) = 72x-3xyz-3xy^2
(3y-4z)^2 = 9y^2-24yz+16z^2
(2y+3)^2*2x = (4y^2+12y+9)*2x = 8xy^2+24xy+18x
5-(3x+2)+(3x-3)-(4x-3) = 5-3x-2+3x-3-4x+3 = 3-4x