1 1 ( ) 13 ( )( ) 16 ( ) ( ) 19 ( ) 2 1( )( ) 24 ( )26 ( )( ) 29( )

Second, fill in Arabic numerals.

15 () 20 () 22 () 57 () 36 () 42 () 73 () 30 () 65 ()

Third, do math.

2+3= 4+5= 2+ 1= 2+6=

5+2= 2+3= 6+ 1= 2+7=