1.3a¯²b.2ab¯²=6a^(-2+1).b^(1-2)=6a^-1.b^-1.2 4xy²z÷(－2x¯²yz¯¹)=(4/-2)*x^(1+2)*y^(2-1)*z^(1+1)=-2x^3y^1z^2.3 (－3ab¯¹)³=(-3)^3*a^(1*3)b^(-1...