/5*x\
|---| 2
\ a / 5*x
a - -----*x - ----
a 2
a a - 10.0*x^2/a^2
3 2
a - 10*x
----------
2
a 3 2
a - 10*x
----------
2
a / 3 2\
-\- a + 10*x /
----------------
2
a