a)5^140:(5^2)^70+(2^3)^32:(2^4)^24+(10^2)^26:10^48-2^5x5^2=
1+2^96:2^96+10^52:10^48-32x25
1+1+10000-800=9202
b){3^100:3^10+[(3^2)^5x3^14]^5:(3^3)^10+[(2^2)^30:(2^2)^29-1]^102:(3^4)^3}:
(2^1+1)^90=
[3^90+(3^10x3^14)^5:3^30+(2^60:2^58-1)^102:3^12]:3^90
(3^90+3^120:3^30+3^102:3^12):3^90
(3^90+3^90+3^90):3^90
3^92:3^90
3^2