/usr/include/TiledArray/expressions/ is in libtiledarray-dev 0.4.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/TiledArray/expressions/add_engine.h
/usr/include/TiledArray/expressions/add_expr.h
/usr/include/TiledArray/expressions/binary_engine.h
/usr/include/TiledArray/expressions/binary_expr.h
/usr/include/TiledArray/expressions/cont_engine.h
/usr/include/TiledArray/expressions/expr.h
/usr/include/TiledArray/expressions/expr_engine.h
/usr/include/TiledArray/expressions/expr_trace.h
/usr/include/TiledArray/expressions/leaf_engine.h
/usr/include/TiledArray/expressions/mult_engine.h
/usr/include/TiledArray/expressions/mult_expr.h
/usr/include/TiledArray/expressions/scal_engine.h
/usr/include/TiledArray/expressions/scal_expr.h
/usr/include/TiledArray/expressions/scal_tsr_engine.h
/usr/include/TiledArray/expressions/scal_tsr_expr.h
/usr/include/TiledArray/expressions/subt_engine.h
/usr/include/TiledArray/expressions/subt_expr.h
/usr/include/TiledArray/expressions/tsr_engine.h
/usr/include/TiledArray/expressions/tsr_expr.h
/usr/include/TiledArray/expressions/unary_engine.h
/usr/include/TiledArray/expressions/unary_expr.h
/usr/include/TiledArray/expressions/variable_list.h