medium Set 81 Table Grid
2=10+7-20x21x
8=16x16+418x6
35x3=1=12=6=
4=6x6+7x178=2
7=72144x10x
6=5=4=5-48x28x1=1
1=6=1-2=6+5=8=
11+18+4=
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