السلام عليكم ورحمة الله وبركاته
Hi pal , greetings, have a good one.
I think the 2nd sentence with "collect" is the best definition to explain how bring together your thoughts.
Collect : to bring together
Sum : mathematical abbreviation to find value of added tow or more amounts together
تحياتي اتمنى اكون وفقت بالشرح بدون تشتيت