2 2*b b 3*b + --- - 4 - - - 2 2 b b
2 2 -7 + - + 3*b b
-7.0 + 2.0/b + 3.0*b^2
3 / 2 4\ - 3*b + b*\- 4*b + 2*b + 3*b / -------------------------------- 3 b
3 2 - 7*b + 3*b -------------- b
2 2*b b -6 + 3*b + --- - - 2 b b