I'm sorry I'm not home so I can't tell you the answer to this but what I can tell you is put together the xy and then put together the -13-20. Hope this helps.
Answer:
-9x2y-33
Step-by-step explanation:
14xy-13-xy-22x-20
-22x+14xy-xy-20-13
-8xy-xy-20-13
-9x2y-33