Intermediate Mathematical Challenge 2010

Puzzle number 9

I'm not satisfied with the explanation because I did $\displaystyle 26+4\pi$ - $\displaystyle 22+2\pi$ to get $\displaystyle 4+2\pi$

With the 26+4 pi being what I got from them being separate pieces $\displaystyle (3+3+3+3+3+3+1+1+1+1+1+1+4(\frac{2\pi}{2}))$

And the second part being the same way without using two 1s and four of 2pi over 2

Could anyone please help me?