help? [indefinate integrals]??

Question

Answer 1

(9)

Step 1:

The integral is .

Apply sum and difference rule in integration: .

Apply constant formula: .

Apply formula: and .

.

.

Solution:

.

Answer 2

(10)

Step 1:

The integral is .

Apply sum and difference rule in integration: .

Apply formula: and .

.

Solution:

.

Answer 3

(11)

Step 1:

The integral is .

Apply sum and difference rule in integration: .

Apply power rule in integration:.

Apply formula: .

.

.

Solution:

.