(a + b)^2 = a^2 + 2ab + b^2(x + y)^2 = x^2 + 2xy + y^2(m + n)^2 = m^2 + 2mn + n^2(p + q)^2 = p^2 + 2pq + q^2(3 + 4)^2 = 3^2 + 234 + 4^2(a - b)^2 = a^2 - 2ab + b^2(x - y)^2 = x^2 - 2xy + y^2(m - n)^2 = m^2 - 2mn + n^2(p - q)^2 = p^2 - 2pq + q^2(5 - 2)^2 = 5^2 - 252 + 2^2(a + b)(a - b) = a^2 - b^2(x + y)(x - y) = x^2 - y^2(m + n)(m - n) = m^2 - n^2(p + q)(p - q) = p^2 - q^2(2 + 3)(2 - 3) = 2^2 - 3^2(a + b)^3 = a^3 + 3a^2b + 3ab^2 + b^3(x + y)^3 = x^3 + 3x^2y + 3xy^2 + y^3(m + n)^3 = m^3 + 3m^2n + 3mn^2 + n^3(p + q)^3 = p^3 + 3p^2q + 3pq^2 + q^3(4 + 5)^3 = 4^3 + 34^25 + 345^2 + 5^3