Effects can be on expression.Logical formLearned from9 sentences. An expression may be reevaluated.Logical formLearned from9 sentences. Arguments can be expressions.Logical formLearned from9 sentences. (Expression tools) can be regular.Logical formLearned from9 sentences. Expressions may be evaluated in sequence.Logical formLearned from9 sentences. Entries may be based on expressions.Logical formLearned from9 sentences. A command may evaluate an expression.Logical formLearned from9 sentences. A function may read an expression.Logical formLearned from9 sentences. Specifications may provide power of (expression matching).Logical formLearned from9 sentences. Expressions may cause (side effects).Logical formLearned from9 sentences. A person may write into an expression.Logical formLearned from9 sentences. A (sum expression) may use a rule.Logical formLearned from9 sentences. A (tree structure) may describe a meaning of an expression.Logical formLearned from9 sentences. A rule can be for making an expression.Logical formLearned from9 sentences. An expression can be bound.Logical formLearned from9 sentences.