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simplification
ALG48 uses the user flag number 5 as an automatic simplification flag. When the flag is set the result of any basic operation commands is automatically simplified, as by an application of RSIM. For instance:
Since the simplification of rational functions can be time consuming (see 4.16), it is sometimes preferable to do a series of operations without simplifying the intermediate results (i.e., with the automatic simplification flag clear) and then to simplify explicitly the final result by using RSIM.