This is an inline \(a^*=x-b^*\) equation.
These are block equations:
\[a^*=x-b^*\] \[ a^*=x-b^* \] \[ a^*=x-b^* \]These are block equations using alternate delimiters:
$$a^*=x-b^*$$ $$ a^*=x-b^* $$ $$ a^*=x-b^* $$Chemistry
Both MathJax and KaTeX provide support for chemical equations. For example:
$$C_p[\ce{H2O(l)}] = \pu{75.3 J // mol K}$$
$$C_p[\ce{H2O(l)}] = \pu{75.3 J // mol K}$$