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[tex]5^3:5-2^2=125:5-4=25-4=\boxed{21}\\\\10^2-6^2=100-36=\boxed{64}\\\\6^2+8^2=36+64=\boxed{100}\\\\3^2-2^3=9-8=\boxed1\\\\(15\cdot2+3):(10+1)=(30+3):11=33:11=\boxed3\\\\80:4\cdot4-2\cdot3=20\cdot4-6=80-6=\boxed{74}\\\\3\cdot8-2\cdot10:5+1=24-20:5+1=24-4+1=20+1=\boxed{21}\\\\28-(14-4+10)+2\cdot6=28-(10+10)+12=28-20+12=8+12=\boxed{20}\\\\10:(9:3+2-2\cdot2)=10:(3+2-4)=10:(5-4)=10:1=\boxed{10}[/tex]
