POA is not anything like maths u dumbshit.
You don't say Science is English just because the contents are
in english douche.
The mathematical techniques involved is too basic for it to be
related to mathematics.
POA in secondary school is very much like book keeping. Its all
about the order of which you enter specific details and knowing
what adds to what or what minus off what.
Yes, you can study it yourself. But it won't be easy. You will
need tons of practice. No kidding. You will definitely need lots of
examples too.