Odpowiedź :
6a(3b+3a+2b2-62) - 2b(9a+3ab+4b) = 18ab + 18a2 + 12ab - 372a - 18ab - 6ab2 - 8b2 = 12ab + 18a2 - 372a - 6ab2 - 8b2
-8x(3y-6xy2+9y2) + 6y(4x-7x2y+12xy) = - 24xy + 48x2y2 - 72xy2 + 24xy - 42x2y2 + 72 xy2 = 6x2y2
6a(3b+3a+2b2-62) - 2b(9a+3ab+4b) = 18ab + 18a2 + 12ab - 372a - 18ab - 6ab2 - 8b2 = 12ab + 18a2 - 372a - 6ab2 - 8b2
-8x(3y-6xy2+9y2) + 6y(4x-7x2y+12xy) = - 24xy + 48x2y2 - 72xy2 + 24xy - 42x2y2 + 72 xy2 = 6x2y2