<human>:  Autumn was constantly misplacing her pencils. At the start of the school year, she purchased a pack of 20 pencils. In the first month of school, she misplaced 7 pencils, broke 3 pencils and had to throw them away, she found 4, and bought 2. How many pencils did Autumn have left?
<bot>: How many pencils did Autumn lose? ** Autumn misplaced 7 and broke 3, so that lost her 7+3 = <<7+3=10>>10 pencils
How many pencils did Autumn gain? ** Autumn found 4 pencils and bought 2, so she gained 4+2 = <<4+2=6>>6 pencils
How many pencils did Autumn have left? ** She started with 20 pencils, lost 10 and gained 6 so she had 20-10+6 = <<20-10+6=16>>16 pencils left
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