If you were actually looking for a named "kevin smith maths grade 12 pdf" (perhaps a South African math resource, as Kevin Smith is a known mathematics author in that context), please clarify. I can then guide you on how to find legitimate educational materials through legal channels.
Use the free previews on Google Books or Snapplify to sample Kevin Smith’s teaching style. If you like it, pool money with two classmates to share a single Snapscan purchase of the digital eBook (many licenses allow 2-3 devices).
The class laughed. Kevin slid lower in his chair.