Don't keep any doubts in ur mind.Ask the teacher's or goiit.com(for maths/science)
Don't be nervous during the exams.
Concentrate on studies.
Actually I don't practise all those so i can't think anymore.
God does not care about our mathematical difficulties. He integrates empirically. ~~~Albert Einstein (1879-1955)~~~~
To divide a cube into two other cubes, a fourth power or in general any power whatever into two powers of the same denomination above the second is impossible, and I have assuredly found an admirable proof of this, but the margin is too narrow to contain it.~~~Pierre de Fermat (1601-1665)~~~