data/mathematica/40.mml
Syntax::tsntxi: "[A]" is incomplete; more input is needed.
ToExpression::esntx: Could not parse \ [A]_t = -kt + [A]_0 as input.
<math
xmlns='http://www.w3.org/1998/Math/MathML'>
<semantics>
<mi>$Failed</mi>
<annotation-xml encoding='MathML-Content'>
<ci>$Failed</ci>
</annotation-xml>
</semantics>
</math>