Input:
pdsolve(ds(y,t)=ds(y,x,2) +ds(y,u,2) +ds (y,v,2))
Write:
`pdsolve(ds(y,t)=ds(y,x,2) +ds(y,u,2) +ds (y,v,2))`
Compute:
$$pdsolve(ds(y,t)=ds(y,x,2) +ds(y,u,2) +ds (y,v,2))$$
Output:
$$pdsolve(ds(y,t)=ds(y,x,2) +ds(y,u,2) +ds (y,v,2))== `Input ERROR: vmath.expression.SyntaxException: Could not combine binary operators.`$$
Result: $$`Input ERROR: vmath.expression.SyntaxException: Could not combine binary operators.`$$
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