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1/1-x^2 integration formula
sin^-1(2x/1+x^2) formula
tan^-1(2x/1-x^2) formula
1/root(1-x^2) integral formula
1/x-1/x-2=3 by quadratic formula
binomial expansion formula (1+x)^1/2
cos inverse 1-x^2/1+x^2 formula
reduction formula for 1/(1+x^2)^n
1/x+1+2/x+2=4/x+4 by quadratic formula