10/24-21/54=90/216-84/216=6/216=1/36
30/54+22/30=150/270+198/270=348/270=1 13/45
10:24-21:54=90:216-84:216=6:216=1:36
30:54+22:30=150:270+198:270=348:270=1 13:45
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10/24-21/54=90/216-84/216=6/216=1/36
30/54+22/30=150/270+198/270=348/270=1 13/45
10:24-21:54=90:216-84:216=6:216=1:36
30:54+22:30=150:270+198:270=348:270=1 13:45