Question

8x cube - 27 y cube +64+72xy

Answer 1

we can't solve this all terms are different so answer will be same as

8x cube - 27 y cube +64+72xy

Answer 2

8x^3-27y^3 +64+72xy

a^3-b^3=a^3+b^3+c^3-3abc

so

2x^3 +3y^3+4^3 -3*2x*3y*4

2x^3-3y^3