Answer :
Your expression is ambiguous.
Do you mean a + (2/5)a^2 + 3?
or perhaps a + 2 / (5a^2) + 3? Use parentheses for added clarity.
If you meant a + (2/5)a^2 + 3, then
(2/5)a^2 + 1a + 3 (this can't be simplified further)
Do you mean a + (2/5)a^2 + 3?
or perhaps a + 2 / (5a^2) + 3? Use parentheses for added clarity.
If you meant a + (2/5)a^2 + 3, then
(2/5)a^2 + 1a + 3 (this can't be simplified further)