} else if( treeName.equalsIgnoreCase("ln") ) {
FclObject terms[] = parseTerms(functionBlock, tree);
return new MffLn(functionBlock, terms);
} else if( treeName.equalsIgnoreCase("log") ) {
FclObject terms[] = parseTerms(functionBlock, tree);
return new MffLog(functionBlock, terms);
} else if( treeName.equalsIgnoreCase("sin") ) {
FclObject terms[] = parseTerms(functionBlock, tree);
return new MffSin(functionBlock, terms);
} else if( treeName.equalsIgnoreCase("cos") ) {
FclObject terms[] = parseTerms(functionBlock, tree);