巴前算后

Explanation: After thinking, repeated consideration. 　　Usage: Joint type; as predicate; that ruminating 　　Source: Mingling 濛 first "half an hour Pai An Jing Qi" Volume 19: "Lawson Youyou, Pakistan, after the former operator, the heart of every pregnant less than the blank of the head, useless place, good as Going live." Thesaurus:  ponder over, beat one's brains, contemplate, think from different angles, cudgel one's `brains think very hard