[tex] \sqrt{61 ^{2} - 60 ^{2}[/tex]
[tex] \sqrt{113 ^{2} - 112 ^{2}[/tex]
[tex] \sqrt{145 ^{2} - 144 ^{2}[/tex]
[tex] \sqrt{313 ^{2} - 312 ^{2}[/tex]