Getting bold math symbols

Load the bm package in your preamble. Do this after all packages, which define symbol fonts. If you are not sure about this, place this line below all font packages:

Declare a command for each bold symbol:

Use the new macros in your document within math mode.

Removing page numbers

The traditional way to avoid displaying page numbers is using the command \pagestyle{empty}. Another way, which also omits pane numbers in the table of contents, is:

If you use hyperref, check that required hyperlinks still work.