The solutions here are given in General Tensors rather than Cartesian tensors. Most problems only include General tensor constructs that have Cartesian equivalents. Here are a few modifications you can make:
1. Note that you can convert superscripts to subscripts and the Cartesian tensor meaning remains intact.
2. The base tensors change from g to e. Again, downgrade the superscripts.
3. When a term has both superscripts and subscripts, let the superscripts downgraded come consistently after the subscripts at the same position.
4. The six indexed Kronecker deltas are simply products of two three indexed Levi-Civita third order alternating tensors.
If there are still clarifications you need, let me know.