1)(a-b+c)(a+b-c)(-a+b+c)= (a^2 - b^2 + c^2 - 2ab + 2ac - 2bc)(-a + b + c)= -(a^2 - b^2 + c^2 - 2ab + 2ac - 2bc)(-a + b + c)= -a^3 + ab^2 - ac^2 + 2a^2b - 2abc + 2a^2c + ab^2 - b^3 + bc^2 - 2ab^2 + 2b^2c - 2abc + ac^2 - bc^2 + c^3 - 2ac^2 + 2bc^2 - 2abc= -a^3 - b^3 - c^3 + 3a^2b + 3ab^2 + 3a^2c - 6abc + 3b^2c - 3ac^2 + 3bc^2
1)(a-b+c)(a+b-c)(-a+b+c)
= (a^2 - b^2 + c^2 - 2ab + 2ac - 2bc)(-a + b + c)
= -(a^2 - b^2 + c^2 - 2ab + 2ac - 2bc)(-a + b + c)
= -a^3 + ab^2 - ac^2 + 2a^2b - 2abc + 2a^2c + ab^2 - b^3 + bc^2 - 2ab^2 + 2b^2c - 2abc + ac^2 - bc^2 + c^3 - 2ac^2 + 2bc^2 - 2abc
= -a^3 - b^3 - c^3 + 3a^2b + 3ab^2 + 3a^2c - 6abc + 3b^2c - 3ac^2 + 3bc^2