Give an alternate, explicit proof of Ehrenfest's theorem,
by showing that direct substitution of
(1) into the left hand side of ( ) gives
the same thing as does direct substitution of
(1) into the right hand side of ( ).
Note: Work under the assumptions that 
and 
do not
depend on time.
Hint: You may wish to first evaluate 
, and then work both sides of (3.3) through a
bit to see how to make the connections.
