Find the integral of `1/(x^2 + a^2)` with respect to x and hence evaluate `int (1)/(x^(2)+2x +2) dx`.

Find the integral of (1)/(x^(2)-a^(2)) with respectto x and hence evaluate int (1)/(x^(2)-16)dx

Find the integral of 1/sqrt(x^2-a^2) with respect to x and hence evalute int1/sqrt(x^2-2x)dx

Find the integral of 1/sqrt(x^(2)-a^(2)) with respect to x and hence evaluate int1/sqrt(4x^(2)-25)dx .

Find the integral of 1/(x^2-a^2) with respect to x and evaluate int(dx)/(x^2-8x+5)

Find the integral of 1/ sqrt(x^(2)- a^(2)) with respect to x and hence evalute int (dx)/sqrt(x^(2)+ 6x - 7) .

Find the integral of sqrt(a^(2)+x^(2)) with respect to x and hence evaluate int sqrt(1+x^(2))dx

Find the integral of (1)/(sqrt(x^(2)+a^(2))) with respect to x and hence evaluate int(1)/(sqrt(x^(2)+7))dx

Find the integral of sqrt(a^(2)+x^(2)) with respect to x and hence evaluate intsqrt(1+x^(2))dx

Find the integral of (1)/(x^(2) + a^(2)) w.r.t.x and hence evaluate int (1)/(x^(2) + 2x + 3) dx.