x-f+5x-4f 30a²b＋2b²c-15a²b-4b²b 2a+3b＋6a+9b-8a+12x-f+5x-4f30a²b＋2b²c-15a²b-4b²b2a+3b＋6a+9b-8a+12b7xy-8wx+5xy-12sy

x-f+5x-4f 30a²b＋2b²c-15a²b-4b²b 2a+3b＋6a+9b-8a+12x-f+5x-4f30a²b＋2b²c-15a²b-4b²b2a+3b＋6a+9b-8a+12b7xy-8wx+5xy-12sy
x-f+5x-4f 30a²b＋2b²c-15a²b-4b²b 2a+3b＋6a+9b-8a+12
x-f+5x-4f
30a²b＋2b²c-15a²b-4b²b
2a+3b＋6a+9b-8a+12b
7xy-8wx+5xy-12sy

x-f+5x-4f 30a²b＋2b²c-15a²b-4b²b 2a+3b＋6a+9b-8a+12x-f+5x-4f30a²b＋2b²c-15a²b-4b²b2a+3b＋6a+9b-8a+12b7xy-8wx+5xy-12sy
6