TMUA practice test: check the last line of algebra
Seventy-five minutes is enough to catch a sign error if you leave time for it.
Write the equation down
Most lost marks are a skipped line, not a missing theorem. On a TMUA practice test, write the relation before you evaluate it.
Review one habit
If you drop a sign or forget to divide, collect three items of that kind and sit them again the next day without the notes.