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(-1+2-22+3x-3x+4y)
b) -(3x+2)+(4y-3x)-22 = -3x - 2 + 4y - 3x - 22 = -6x +4y - 2
c) 1,2xy-6y-(3xy+10 1/4y-7,3) = 1,2xy - 6y - 3xy -10¼y + 7,3 = -2,8xy - 16¼y + 7,3