Equal (4): Everything in this red space must be equal to 4. The answer is 5-4, placed horizontally; 4-4, placed horizontally.
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。关于这个话题，同城约会提供了深入分析
На шее Трампа заметили странное пятно во время выступления в Белом доме23:05
Step through the construction below. Each time a new point is inserted, watch the tree decide whether it needs to split a region: