include "basic_2A/notation/relations/freestar_4.ma".
include "basic_2A/substitution/lift_neg.ma".
include "basic_2A/substitution/drop.ma".
include "basic_2A/notation/relations/freestar_4.ma".
include "basic_2A/substitution/lift_neg.ma".
include "basic_2A/substitution/drop.ma".