Find the indefinite integral of: $\rm \int \frac{dx}{5x^{2} - 4}$

Find the indefinite integral of: $\rm \int \frac{(2x + 2)}{3 + 2x - x^{2}}dx$

Find the indefinite integral of: $\rm \int \frac{6x + 1}{x^{2} + 9} dx$

Find the indefinite integral of: $\rm \int \frac{x \ dx}{x^{2} + 4x - 12}$

Find the indefinite integral of: $\rm \int \frac{dx}{e^{x} + e^{-x}}$

Find the indefinite integral of: $\rm \int \frac{x dx}{x^{2} + 4x + 40}$

Find the indefinite integral of: $\rm \int \frac{dx}{4x^{2} - 9}$.

Find the indefinite integral of: $\rm \frac{dx}{x^{2} + 6x + 8}$

Find the indefinite integral of: $\rm \int \frac{dx}{1 + x + x^{2}}$.

Find the indefinite integral of: $\rm \int \frac{dx}{1 + x - x^{2}}$.

Find the indefinite integral of: $\rm \int \frac{\cos x dx}{\sin^{2} x + 4 \sin x + 5}$.

Find the indefinite integral of: $\rm \int \frac{2x + 3}{x^{2} + 4x + 5} dx$.

Find the indefinite integral of: $\rm \int \frac{4x + 3}{4x^{2} + 12x + 5} dx$.

Find the indefinite integral of: $\rm \int \frac{6x + 2}{9x^{2} + 6x + 26} dx$.

Find the indefinite integral of: $\rm \int \frac{dx}{\sqrt{x^{2} - 16}}$.

Find the indefinite integral of: $\rm \int \frac{x dx}{x^{2} + 4x + 40}$.