+129907 14.
d^2 - 5d + 6 d^2 - 4d - 5
__________ + _____________
d^2 + d - 6 d^2 + 3d + 2
(d - 3) (d - 2) (d - 5) ( d + 1)
__________ + ___________
(d + 3) ( d - 2) (d + 2) ( d + 1)
d- 3 d - 5
____ + ______
d + 3 d + 2
(d - 3)(d + 2) + ( d - 5) (d + 3)
________________________
(d + 3) ( d + 2)
[ d^2 - d - 6 + d^2 - 2d - 15 ]
__________________________
( d + 3) ( d + 2)
2d^2 - 3d - 21
____________
( d + 2) ( d + 3)
