There are 25 pine trees in the campus, 7 more cypress trees than pine trees, and the number of poplar trees is twice the total number of pine trees and cypress trees. How many poplar trees are there?
校园里有松树25棵，柏树比松树多7棵，杨树的棵数是松树和柏树总棵数的2倍，杨树有多少棵？
<result>104</result>