Отыскать производную от функции f (x)=(b+c)^3+(c+a)^3+(a+b)^3-3(b+c)*(c+a)*(a+b)-2(a^3+b^3+c^3-3abc)

f(x) = ((b + c)^3 + (c + a)^3 + (a + b)^3 - 3(b + c)*(c + a)*(a + b) - 2(a^3 + b^3 + c^3 - 3abc)) = ((b + c)^3) + ((c + a)^3) + ((a + b)^3) (3(b + c)*(c + a)*(a + b)) (2(a^3 + b^3 + c^3 - 3abc)) = (b + c) * ((b + c)^3) + (c + a) * ((c + a)^3) + (a + b) * ((a + b)^3) (6abc + 3cb^2 + 3ba^2 + 3ab^2 + 3ac^2 + 3cb^2 + 3ca^2 ) (2a^3 + 2b^3 + 2c^3 - 6abc) = (b + c) * ((b + c)^3) + (c + a) * ((c + a)^3) + (a + b) * ((a + b)^3) (6abc) + (3cb^2) + (3ba^2) + (3ab^2) + (3ac^2) + (3cb^2) + (3ca^2 ) (2a^3) + (2b^3) + (2c^3) (6abc).