Correcto: 23×25=28, 32×52=152, 23:2=22, 52:54=5{-2}, 83:43=23, 32:92=(0,5)2, (52)3=56, 6{-1}=1/6, 1230=1, Incorrecto: 23+24=27, 62+52=112, 72-73=7{-1}, 83-63=23, (63)2=65, 7{-2}=72, 50=0,

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