Complex sentence: Symbols of grouping can be removed using the associative and distributive laws, also they can be removed if the expression inside the symbol of grouping is sufficiently simplified so no ambiguity results from their removal.
Split into simpler sentences: Symbols of grouping can be removed using the associative and distributive laws for various operations. They can also be removed if the expression inside the symbol of grouping is sufficiently simplified so that no ambiguity results from their removal.