la a amplificam cu 2
a=[(10/4+5/4-3/4):5+2/5]^5
a=(12/4:5+2/5)^5
inversam pe 5 si da
a=(12/4×1/5+2/5)^5
a=(12/20+2/5)^5
amplificam pe 2/5 cu 4
a=(12/20+8/20)^5
A=20^5
b=(7/3+7/2):7/12-[10/3:1/3-3:3/10+3/2:(1/2)^2]
b=35/6×12/7-[10/3×3/1-3×10/3+3/2×(2/1)^2]
b=245/72-(10-10+3/2×4/1)
b=245/72-(0-12/2)
b=245/72+12/2
b=245/72+432/72
b=677/72
a>b
