Question

c(c-2)(c-2)-(c-1)(c^2+c+1)

Answer 1

с(c-2)(c-2)-(c-1)(c^2+c+1) = с(с^2 - 4с + 4) - (с^3 - 1) = с^3 - 4с^2 + 4с - с^3 + 1 = -4с^2 + 4с + 1.