a2−b2a^2 - b^2a2−b2^3:a2−b2a^2 - b^2a2−b2^3 = a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2 Expand using the formula for the difference of squares a2−b2=(a+b)(a−b)a^2 - b^2 = (a + b)(a - b)a2−b2=(a+b)(a−b):a+ba + ba+ba−ba - ba−ba+ba + ba+ba−ba - ba−ba+ba + ba+ba−ba - ba−b = a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2 = a4−2a2b2+b4a^4 - 2a^2b^2 + b^4a4−2a2b2+b4a2−b2a^2 - b^2a2−b2 = a^6 - 2a^4b^2 + a^2b^4 - a^4b^2 + 2a^2b^4 - b^6= a^6 - 3a^4b^2 + 3a^2b^4 - b^6
m2+n2m^2 + n^2m2+n2^3:m2+n2m^2 + n^2m2+n2^3 = m2+n2m^2 + n^2m2+n2m2+n2m^2 + n^2m2+n2m2+n2m^2 + n^2m2+n2 Expand using the formula for the sum of squares m2+n2=(m+n)2−2mnm^2 + n^2 = (m + n)^2 - 2mnm2+n2=(m+n)2−2mn:m+nm + nm+n^2 - 2mn)m+nm + nm+n^2 - 2mn)m+nm + nm+n^2 - 2mn= m2+2mn+n2−2mnm^2 + 2mn + n^2 - 2mnm2+2mn+n2−2mnm2+2mn+n2−2mnm^2 + 2mn + n^2 - 2mnm2+2mn+n2−2mnm2+2mn+n2−2mnm^2 + 2mn + n^2 - 2mnm2+2mn+n2−2mn = m4+2m3n+m2n2−2m3n−4m2n2−2mn3+m2n2+2mn3+n4−2m2n2−4mn3−2n4m^4 + 2m^3n + m^2n^2 - 2m^3n - 4m^2n^2 - 2mn^3 + m^2n^2 + 2mn^3 + n^4 - 2m^2n^2 - 4mn^3 - 2n^4m4+2m3n+m2n2−2m3n−4m2n2−2mn3+m2n2+2mn3+n4−2m2n2−4mn3−2n4 = m^6 + 3m^4n^2 + 3m^2n^4 + n^6
2a2+b22a^2 + b^22a2+b2^3:2a2+b22a^2 + b^22a2+b2^3 = 2a2+b22a^2 + b^22a2+b22a2+b22a^2 + b^22a2+b22a2+b22a^2 + b^22a2+b2 Expand using the formula for the sum of squares (2a)2+b2=(2a+b)(2a−b)(2a)^2 + b^2 = (2a + b)(2a - b)(2a)2+b2=(2a+b)(2a−b):2a+b2a + b2a+b2a−b2a - b2a−b2a+b2a + b2a+b2a−b2a - b2a−b2a+b2a + b2a+b2a−b2a - b2a−b = 4a2−b24a^2 - b^24a2−b24a2−b24a^2 - b^24a2−b24a2−b24a^2 - b^24a2−b2 = 16a4−2b216a^4 - 2b^216a4−2b216a4−b216a^4 - b^216a4−b2 = 256a^8 - 32a^4b^2 - 16a^4b^2 + 2b^4= 256a^8 - 48a^4b^2 + 2b^4
a2−b2a^2 - b^2a2−b2^3:
a2−b2a^2 - b^2a2−b2^3 = a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2 Expand using the formula for the difference of squares a2−b2=(a+b)(a−b)a^2 - b^2 = (a + b)(a - b)a2−b2=(a+b)(a−b):
a+ba + ba+ba−ba - ba−ba+ba + ba+ba−ba - ba−ba+ba + ba+ba−ba - ba−b = a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2a2−b2a^2 - b^2a2−b2 = a4−2a2b2+b4a^4 - 2a^2b^2 + b^4a4−2a2b2+b4a2−b2a^2 - b^2a2−b2 = a^6 - 2a^4b^2 + a^2b^4 - a^4b^2 + 2a^2b^4 - b^6
= a^6 - 3a^4b^2 + 3a^2b^4 - b^6
m2+n2m^2 + n^2m2+n2^3:
m2+n2m^2 + n^2m2+n2^3 = m2+n2m^2 + n^2m2+n2m2+n2m^2 + n^2m2+n2m2+n2m^2 + n^2m2+n2 Expand using the formula for the sum of squares m2+n2=(m+n)2−2mnm^2 + n^2 = (m + n)^2 - 2mnm2+n2=(m+n)2−2mn:
m+nm + nm+n^2 - 2mn)m+nm + nm+n^2 - 2mn)m+nm + nm+n^2 - 2mn
= m2+2mn+n2−2mnm^2 + 2mn + n^2 - 2mnm2+2mn+n2−2mnm2+2mn+n2−2mnm^2 + 2mn + n^2 - 2mnm2+2mn+n2−2mnm2+2mn+n2−2mnm^2 + 2mn + n^2 - 2mnm2+2mn+n2−2mn = m4+2m3n+m2n2−2m3n−4m2n2−2mn3+m2n2+2mn3+n4−2m2n2−4mn3−2n4m^4 + 2m^3n + m^2n^2 - 2m^3n - 4m^2n^2 - 2mn^3 + m^2n^2 + 2mn^3 + n^4 - 2m^2n^2 - 4mn^3 - 2n^4m4+2m3n+m2n2−2m3n−4m2n2−2mn3+m2n2+2mn3+n4−2m2n2−4mn3−2n4 = m^6 + 3m^4n^2 + 3m^2n^4 + n^6
2a2+b22a^2 + b^22a2+b2^3:
2a2+b22a^2 + b^22a2+b2^3 = 2a2+b22a^2 + b^22a2+b22a2+b22a^2 + b^22a2+b22a2+b22a^2 + b^22a2+b2 Expand using the formula for the sum of squares (2a)2+b2=(2a+b)(2a−b)(2a)^2 + b^2 = (2a + b)(2a - b)(2a)2+b2=(2a+b)(2a−b):
2a+b2a + b2a+b2a−b2a - b2a−b2a+b2a + b2a+b2a−b2a - b2a−b2a+b2a + b2a+b2a−b2a - b2a−b = 4a2−b24a^2 - b^24a2−b24a2−b24a^2 - b^24a2−b24a2−b24a^2 - b^24a2−b2 = 16a4−2b216a^4 - 2b^216a4−2b216a4−b216a^4 - b^216a4−b2 = 256a^8 - 32a^4b^2 - 16a^4b^2 + 2b^4
= 256a^8 - 48a^4b^2 + 2b^4