Evaluate the integrals in Exercises 31–78.
69. ∫dy/(y√(4y²-1))

Evaluate the integrals in Exercises 77–90.

79. ∫(from -1 to 0)6dt/√(3-2t-t²)

Evaluate the integrals in Exercises 67–74 in terms of

a. inverse hyperbolic functions.

67. ∫(from 0 to 2√3)dx/√(4+x²)

Evaluate the integrals in Exercises 67–74 in terms of

a. inverse hyperbolic functions.

69. ∫(from 5/4 to 2)dx/(1-x²)

Evaluate the integrals in Exercises 31–78.

67. ∫(from -2 to 2)3dt/(4+3t²)

Evaluate the integrals in Exercises 31–78.

71. ∫(from √2/3 to 2/3)dy/(|y|√(9y²-1))

Evaluate the integrals in Exercises 31–78.

73. ∫dx/√(-2x-x²)

Evaluate the integrals in Exercises 67–74 in terms of

a. inverse hyperbolic functions.

71. ∫(from 1/5 to 3/13)dx/(x√(1-16x²))

Evaluate the integrals in Exercises 67–74 in terms of

a. inverse hyperbolic functions.

73. ∫(from 0 to π)cos(x)dx/√(1+sin²x)