Using an LLM with CAS math validation tools to validate it's work and then to generate a markdown document with CAS blocks: :::cas mode=chain engine=sympy as

Using an LLM with CAS math validation tools to validate it's work and then to generate a markdown document with CAS blocks: :::cas mode=chain engine=sympy assumptions="x \neq 1" $$ \frac{x^2 - 1}{x - 1} $$ $$ = \frac{(x-1)(x+1)}{x-1} $$ $$ = x + 1 $$ ::: Which you can run to check it.