15.52-1.6X5-5.7=
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Cu[, D
15.52-1.6X5-5.7=
15.52-1.6X5-5.7=
15.52-1.6X5-5.7=
15.52-1.6x5-5.7
=15.52-8-5.7
=15.52-(8+5.7)
=15.52-13.7
=1.82
15.52-1.6x5-5.7
=15.52-8-5.7
=15.52-(8+5.7)
=15.52-13.7
=1.82