R
Risultato 39/8
2.25·((83 - 8)/90) + 3/9 + 3.75/1.25 - 3/9=
=9/4·((83 - 8)/90) + 3/9 + 3.75/1.25 - 3/9=
=9/4·(5/6) + 3/9 + 15/4/(5/4) - 1/3=
=15/8 + 1/3 + 3 - 1/3= 15/8 + 3 = 39/8
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