<human>:  Thomas made 4 stacks of wooden blocks. The first stack was 7 blocks tall. The second stack was 3 blocks taller than the first. The third stack was 6 blocks shorter than the second stack, and the fourth stack was 10 blocks taller than the third stack. If the fifth stack has twice as many blocks as the second stack, how many blocks did Thomas use in all?
<bot>: How many blocks are in the second stack? ** The second stack has 7 blocks + 3 blocks = <<7+3=10>>10 blocks.
How many blocks are in the third stack? ** The third stack has 10 blocks - 6 blocks = <<10-6=4>>4 blocks.
How many blocks are in the fourth stack? ** The fourth stack has 4 blocks + 10 blocks = <<4+10=14>>14 blocks.
How many blocks are in the fifth stack? ** The fifth stack has 10 blocks x 2 = <<10*2=20>>20 blocks.
How many blocks are in total? ** In total there are 7 blocks + 10 blocks + 4 blocks + 14 blocks + 20 blocks = <<7+10+4+14+20=55>>55 blocks.
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