2
x + 400
2 - --------
2
x $$2 - \frac{1}{x^{2}} \left(x^{2} + 400\right)$$
/ 2\
| 400 + x |
2*|-1 + --------|
| 2 |
\ x /
-----------------
x $$\frac{1}{x} \left(-2 + \frac{1}{x^{2}} \left(2 x^{2} + 800\right)\right)$$
/ 2\
| 400 + x |
6*|1 - --------|
| 2 |
\ x /
----------------
2
x $$\frac{1}{x^{2}} \left(6 - \frac{1}{x^{2}} \left(6 x^{2} + 2400\right)\right)$$