(1).

Step 1 :

The function is .

Apply derivative on each side with respect to .

Sum or difference rule of derivative :.

.

.

Power rule of derivative : .

Therefore, .

Solution :

.

(2).

Step 1:

The function is .

Apply derivative on each side with respect to .

Chain rule of derivative : .

Where .

.

Sum or difference rule of derivative :.

Therefore, .

Solution :

.