/4\ |-| 3*a \a/ --- - 11*a - --- - 16 2 2
2 19*a -16 - - - ---- a 2
-16.0 - 2.0/a - 9.5*a
2 -8 - 64*a - 38*a ----------------- 4*a
2 -4 - 32*a - 19*a ----------------- 2*a
/4\ |-| 3*a \a/ -16 + --- - 11*a - --- 2 2
/ 2 \ -\4 + 19*a + 32*a/ -------------------- 2*a