Question

How do you simplify `4/(5n)-1/(10n^3)`?

Answer 1

You may want the same denominator.

Explanation:

We multiply the left term by `1`, disguised as `(2n^2)/(2n^2)`

`=(4xx2n^2)/(5nxx2n^2)-1/(10n^3)=(8n^2)/(10n^3)-1/(10n^3)=(8n^2-1)/(10n^3)`

I'm afraid it can't get much simpler than this.