/usr/include/libgoffice-0.10/goffice/math/ is in libgoffice-0.10-dev 0.10.18-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libgoffice-0.10/goffice/math/go-R.h
/usr/include/libgoffice-0.10/goffice/math/go-accumulator.h
/usr/include/libgoffice-0.10/goffice/math/go-complex.h
/usr/include/libgoffice-0.10/goffice/math/go-cspline.h
/usr/include/libgoffice-0.10/goffice/math/go-distribution.h
/usr/include/libgoffice-0.10/goffice/math/go-dtoa.h
/usr/include/libgoffice-0.10/goffice/math/go-fft.h
/usr/include/libgoffice-0.10/goffice/math/go-math.h
/usr/include/libgoffice-0.10/goffice/math/go-matrix.h
/usr/include/libgoffice-0.10/goffice/math/go-matrix3x3.h
/usr/include/libgoffice-0.10/goffice/math/go-quad.h
/usr/include/libgoffice-0.10/goffice/math/go-rangefunc.h
/usr/include/libgoffice-0.10/goffice/math/go-regression.h
/usr/include/libgoffice-0.10/goffice/math/goffice-math.h