(1)8a3b2﹣12ab3c+6a3b2c
(2)8a(x﹣a)+4b(a﹣x)﹣6c(x﹣a)
(3)﹣x5y3+x3y5(4)4(a﹣b)2﹣16(a+b)2
(5)﹣8ax2+16axy﹣8ay2(6)m2+2n﹣mn﹣2m
(7)a2﹣4a+4﹣c2
(8)(a2+1)2﹣4a2
(9)(x+3y)2+(2x+6y)(3y﹣4x)+(4x﹣3y)2(10)a4﹣6a2﹣27.
(1)8a3b2﹣12ab3c+6a3b2c
(2)8a(x﹣a)+4b(a﹣x)﹣6c(x﹣a)
(3)﹣x5y3+x3y5(4)4(a﹣b)2﹣16(a+b)2
(5)﹣8ax2+16axy﹣8ay2(6)m2+2n﹣mn﹣2m
(7)a2﹣4a+4﹣c2
(8)(a2+1)2﹣4a2
(9)(x+3y)2+(2x+6y)(3y﹣4x)+(4x﹣3y)2(10)a4﹣6a2﹣27.