(1)

Step 1:

The integral function is .

Sum and difference rule of integral : .

Power rule of integral :.

.

.

Solution :

.

(2)

Step 1:

The integral function is .

Power rule of integral :.

.

Solution :

.

(3)

Step 1:

The integral function is .

Let .

Differentiate on each side with respect to .

.

Substitute and in the integral function.

Integral of logarithm function is  .

.

Substitute in the integral function.

Solution :

.

(4)

Step 1:

The integral function is .

Let  .

.

Differentiate on each side with respect to .

Substitute  , and in the integral function.

Integral of logarithm function is .

Substitute in integral function.

.

Solution :