help? intergral

Question

Answer 1

(1)

Step 1:

The integral is .

Sum and difference rule of integral : .

Power rule of integral formula : .

                                   

.

Solution :

.

Answer 2

(2)

Step 1:

The integral is .

Sum rule of integral : .

Power rule of integral formula : .

                              

.

Solution :

.

Answer 3

(3)

Step 1:

The integral is .

Sum and difference rule of integral : .

Power rule of integral formula : .

                                               

.

Solution :

.