(18-3²)+9-5+(10-2²)=
=(18-9)+9-5+(10-4)=
=9+9-5+6=
=18-5+6=
=13+6=
=19
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(18-3²)+9-5+(10-2²)=
=(18-9)+9-5+(10-4)=
=9+9-5+6=
=18-5+6=
=13+6=
=19