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9 months ago
  1. \item
  2. Given the formula
  3. $$\varphi = p \lor q \land q \imp \lnot r \leftrightarrow \lnot p \land s,$$
  4. how should the formula be interpreted according to operator precedence?
  5. Insert parenthesis to indicate the correct operator precedence
  6. and draw the parse tree for $\varphi$. \\