A test of Equation References

Here is a labeled equation:

with a reference to ref1: , and another numbered one with no label:

This one uses \nonumber:

Here’s one using the equation environment:

and one with equation* environment:

This is a forward reference and another for the following equation:

More math:

Here is a ref inside math: and text after it.

Here’s a bad ref to a nonexistent label.

An alignment:

and a starred one: