Question

its urgent please solve that question​

Answer 1

what to do in it?

Do we have to factorise it , or expand?

if expansion, then it's given in attachment

if factorisation,

(x⁴ + y⁴)(x²-y²)

(x⁴ + y⁴)(x-y)(x+y) ....[using the identity a²-b²=(a+b)(a-b)]