The expression is
.
Consider the first expression is
.
Apply power of a product property:
.

Apply power of a power property:
.


Consider the second expression is
.
Apply power of a power property:
.


Apply power of a product property:
.

Apply power of a power property:
.


The values of
and
are substitute in the
.

Group the coefficients and the variables.
\
Group the same variables.
\
Apply product of powers property:
.


The value of
.