Which expression has a value of 3?
a. 3(4 *to the power of 2* - 3*to the power of 2*)
b. 24-23 x 3
c. 3*to the power of 3* - 3*to the power of 2
d. (6*to the power of 2* - 3) (9*to the power of 2* - 70)​