Step 1:

The integral is .

Apply sum and difference formula .

.

Solve the integral .

Solve the integral by using substitution method.

Apply derivative on each side with respect to .

.

Substitute and in .

Back substitute .

Step 2:

Solve the integral .

Solve the integral by using substitution method.

Apply derivative on each side with respect to .

.

Substitute  and in .

Back substitute .

Step 3:

Solve the integral .

.

Apply formula .

.

.

Solution:

.