(3)

Step 1 :

The integration functions are , .

Solve the integration function .

Property of integration : .

Substitute in the above integration function.

.

Solution :

.

(4)

Step 1 :

The integration functions are , .

Find the value of the integration function .

Distributive property of integration : .

Property of integration : .

Substitute , in the above integration function.

.

Solution :

.