Question

16-y^2 1/8km^3 +kn^3

Answer 1

16-y^2 = (4-y)*(4+y)
1/8km^3 +kn^3 = k*(1/2m+n)*(1/4m^2-1/2mn+n^2)

Answer 2

It seems like you have provided an expression, but it's not entirely clear what you want to do with it. The expression you've given is:

16 - y^2 + 1/8 km^3 + kn^3

If you could clarify your question or let me know what you'd like to do with this expression, I'd be happy to help you further. For example, do you want to simplify it, solve for a variable, factor it, or evaluate it for specific values of the variables? Let me know, and I'll provide the appropriate assistance.