The integrals below involve `ax^2+bx+c`
1) `int 1/(ax^2+bx+c) dx = 2/sqrt(4ac-b^2) tan^-1 ((2ax+b)/sqrt(4ac-b^2))`
OR `= 1/sqrt(b^2-4ac) ln ((2ax+b-sqrt(b^2-4ac))/(2ax+b+sqrt(b^2-4ac)))`
If `b^2=4ac`, then `ax^2+bx+c=a(x+b/(2a))^2`; use the results in the tables for Integrals Involving `ax+b`.
If `b=0`, use the results in the table for Integrals Involving `x^2+a^2`.
If `a` or `c=0`, use the results in the tables for Integrals Involving `ax+b`.
2) `int x/(ax^2+bx+c) dx = 1/(2a) ln (ax^2+bx+c)-b/(2a) int 1/(ax^2+bx+c) dx`
3) `int x^2/(ax^2+bx+c) dx = x/a-b/(2a^2) ln (ax^2+bx+c)+(b^2-2ac)/(2a^2) int 1/(ax^2+bx+c) dx`
4) `int x^m/(ax^2+bx+c) dx = x^(m-1)/((m-1)a)-c/a int x^(m-2)/(ax^2+bx+c) dx -b/a int x^(m-1)/(ax^2+bx+c) dx`
5) `int 1/(x(ax^2+bx+c)) dx = 1/(2c) ln (x^2/(ax^2+bx+c))-b/(2c) int 1/(ax^2+bx+c) dx`
6) `int 1/(x^2(ax^2+bx+c)) dx = b/(2c^2) ln ((ax^2+bx+c)/x^2)-1/(cx)+(b^2-2ac)/(2c^2) int 1/(ax^2+bx+c) dx`
7) `int 1/(x^n(ax^2+bx+c)) dx = -1/((n-1)cx^(n-1))-b/c int 1/(x^(n-1)(ax^2+bx+c)) dx-a/c int 1/(x^(n-2)(ax^2+bx+c)) dx`
8) `int 1/(ax^2+bx+c)^2 dx = (2ax+b)/((4ac-b^2)(ax^2+bx+c))+(2a)/(4ac-b^2) int 1/(ax^2+bx+c) dx`
9) `int x/(ax^2+bx+c)^2 dx = -(bx+2c)/((4ac-b^2)(ax^2+bx+c))-b/(4ac-b^2) int 1/(ax^2+bx+c) dx`
10) `int x^2/(ax^2+bx+c)^2 dx = ((b^2-2ac)x+bc)/(a(4ac-b^2)(ax^2+bx+c))+(2c)/(4ac-b^2) int 1/(ax^2+bx+c) dx`
11) `int x^m/(ax^2+bx+c)^n dx = -x^(m-1)/((2n-m-1)a(ax^2+bx+c)^(n-1))+((m-1)c)/((2n-m-1)a) int x^(m-2)/(ax^2+bx+c)^n dx -((n-m)b)/((2n-m-1)a) int x^(m-1)/(ax^2+bx+c)^n dx`
12) `int x^(2n-1)/(ax^2+bx+c)^n dx = 1/a int x^(2n-3)/(ax^2+bx+c)^(n-1) dx-c/a int x^(2n-3)/(ax^2+bx+c)^n dx -b/a int x^(2n-2)/(ax^2+bx+c)^n dx`
13) `int 1/(x(ax^2+bx+c)^2) dx = 1/(2c(ax^2+bx+c))-b/(2c) int 1/(ax^2+bx+c)^2 dx+1/c int 1/(x(ax^2+bx+c)) dx`
14) `int 1/(x^2(ax^2+bx+c)^2) dx = -1/(cx(ax^2+bx+c))-(3a)/c int 1/(ax^2+bx+c)^2 dx -(2b)/c int 1/(x(ax^2+bx+c)^2) dx`
15) `int 1/(x^m(ax^2+bx+c)^n) dx = -1/((m-1)cx^(m-1)(ax^2+bx+c)^(n-1))-((m+2n-3)a)/((m-1)c) int 1/(x^(m-2)(ax^2+bx+c)^n) dx -((m+n-2)b)/((m-1)c) int 1/(x^(m-1)(ax^2+bx+c)^n) dx`