g)2-rad3-(7-4rad3)=2-rad3-7+4rad3=-5+3rad3
h)1/8rad2 +1/(2rad2)la 3 -1/rad2 la 5=rad2/16+1/8×2rad2 -1/2la2×rad2=rad2/16+1/16rad2-1/4rad2=rad2/16+rad2/32-rad2/8=-rad2/32
