Tolong bantu jawab no a,b,c,d trimss

A. 2^2 + 2^5 + 2^6 
b. ( 2^7 x 2^3 x 2^2 ) : ( 2^8 x 2^2 x 2 )
c. 2^8 : 2^3 : (-2)^2
d. 2^4 x 2^6 : 2^5