<human>:  Sami finds 3 spiders in the playground. Hunter sees 12 ants climbing the wall. Ming discovers 8 ladybugs in the sandbox, and watches 2 of them fly away. How many insects are remaining in the playground?
<bot>: How many insects do the children find? ** The children find 3 + 12 + 8 = <<3+12+8=23>>23 insects.
How many insects are remaining in the playground? ** After the ladybugs fly away, there are 23 - 2 = <<23-2=21>>21 insects.
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