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55:[(462:6:7+10×10):3-(270:5-3×7-1)]-1

Răspuns :

55:[(11+100):3-(54-21-1)]-1=
55:[111:3-32]-1=
55:[37-32]-1=
55:5-1=
11-1=10
55:[(462:6:7+10×10):3-(270:5-3×7-1)]-1=
=55:[(77:7+10×10):3-(54-3×7-1)]-1
=55:[(11+10×10):3-(54-21-1)]-1
=55:[(11+100):3-(33-1)]-1
=55:(111:3-32)-1
=55:(37-32)-1
=55:5-1
=11-1
=10