Need help creating filter query in Free version

I have a project labeled "House". I have a task named "Laundry". I have subtasks labeled "Diapers", "Warm wash", "Cold wash," etc. How can I filter-query this to show Laundry tasks but not the subtasks. The "Groceries" and "Meal Planning" sections of the "House" project are not required to be seen in this filter, hence the usage.

>Here is my current filter query: **p1 | p2 | p3 | p4 & !/Groceries & !/Meal Planning, !subtask**

I have the free version for now-- I'm still trying to figure out if I can stick to using Todoist as my planning app. Why are the subtasks still showing up in my "Priorities" filter view? Is it because I have the Free version or am I doing the "!subtask" string wrong? Thanks for any help in advance!