Frac sqrt 7 9 July 8, 2019 16 32 64 128 Frac 7 sqrt 90 $ sqrt frac 81 9 - 7 =$ Frac 6 9 sqrt 7 3 Frac sqrt 72 9 $ frac 7 sqrt 2 =$ Frac 7 sqrt 7 Frac frac sqrt 3 2 frac 1 2
