(1) \ \

Step 1:

The integral is .

Sum and difference rule of integral : .

Power rule of integral formula : .

.

Solution :

.

(2)

Step 1:

The integral is .

Sum rule of integral : .

Power rule of integral formula : .

.

Solution :

.

(3) \ \

Step 1:

The integral is .

Sum and difference rule of integral : .

Power rule of integral formula : .

.

Solution :

.