5:7=():21=( )/28=30:( )=45/( )=( )/( )

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5:7=():21=( )/28=30:( )=45/( )=( )/( )
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5:7=():21=( )/28=30:( )=45/( )=( )/( )
5:7=():21=( )/28=30:( )=45/( )=( )/( )

5:7=():21=( )/28=30:( )=45/( )=( )/( )
15,20,42,63 ,50/70