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+id = 170
+name = 'expr/2'
+slug = 'arithmetic expressions'
+
+description = '''\
+<p>Write a DCG with the starting symbol <code>expr</code> for the language of arithmetic expressions consisting of numbers (without leading zeros), addition and multiplication. Subexpressions can be grouped using parentheses.</p>
+<p>Example words: <code>(1+2)*3</code>, <code>42*8*3</code>, <code>(2+1)*(3+4)</code>.</p>
+'''
+
+hint = {}