Practice problem
What is (−1)×1×(−1)×1×1×1×(−1)(-1)\times 1 \times (-1) \times 1\times 1\times 1\times(-1)(−1)×1×(−1)×1×1×1×(−1)?
−1-1−1
111
333
444
Type a concept, like “slope” or “photosynthesis”.
