The expression is
.
(Formula:
)
(Multiply:
)
The base is 3.
\The exponent is 2.
\
Means 3 is a factor of 2 times.
The base is 4.
\The exponent is 2.
\
Means 4 is a factor of 2 times.

Substitute values
in above equation.
(Add:
)
The value of the expression is 49.