thực hiện phép tính
a) A = \(\left(\frac{3}{2}xyz\right)\). \(\left(\frac{-4}{6}x^2yz^2\right)\)
b) B = \(\left(\frac{1}{2}xyz\right)\). \(\left(2x^2yz\right)^2\)
c) C= (-5x2y + 3xy2 + 7) + (-6x2y + 4xy2 - 5)
d) D= (3x + y - z) - (4x - 3y +6z)
e) E = 2x.(-3+5) + 2x.(2x-12) + 26x