[（a-b)^2]^3-[（b-a)^3]^2
=（a-b)^6-（b-a)^6
=（a-b)^6-[-1*（a-b)]^6
=（a-b)^6-(-1)^6（a-b)^6
=（a-b)^6-（a-b)^6
=0
x^2*x^4*x^6+（x^3）^3*x^3+[（-x)^4]^3
=x^(2+4+6)+x^(3*3+3)+x^(4*3)
=x^12+x^12+x^12
=3x^12
a+2a+3a+a*a^2a^3+（a^2）^3
=(1+2+3)a+a^(1+2+3)+a^(2*3)
=6a+a^6+a^6
=6a+2a^6