public static ulong[] Hash(this ISymbolicExpressionTreeNode node, bool simplify = false, bool strict = false)
{
var hashNodes = simplify ? node.MakeNodes(strict).Simplify(HashFunction) : node.MakeNodes(strict).Sort(HashFunction);
var hashes = new ulong[hashNodes.Length];
for (int i = 0; i < hashes.Length; ++i)
{
hashes[i] = hashNodes[i].CalculatedHashValue;
}
return(hashes);
}