I won't be much help, but With the foil method, I find it helps if you physically draw 4 lines between the brackets, if that is possible. Also remember at all times
[+] times [+] = +
[+] times [-] = -
[-] times [-] = +
And you'll be ok. (sorry if you already know all of that, but it's the things that I always struggled with to start with.
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Female, 16
Knowledge is knowing that tomatoes are fruits. It takes wisdom to know not to put them in a fruit salad.