`a, 12^8 : 12 = 12^(8-1) = 12^7`
`b, 243 : 3^4 = 3^(5-4) = 3`
`c, 10^9 : 10^5 = 10^4`
`d, 8^(6+3+1) = 8^10 = 2^30`
`e, = 12^(2+3+1) = 12^6`
`f, = 6^(4+3+1) = 6^8`
a, = 127 b, 35 : 34= 31 c 109 : 104= 105
d, = 8 x 89= 810 e, 12 x 125= 126 g, 6 x 67= 68