Final answer:
The expression 1-121-1-31 simplifies to -152.
Step-by-step explanation:
The expression 1-121-1-31 can be simplified by performing the subtraction operations from left to right. Starting with 1 minus 121 equals -120, then subtracting 1 gives -121, and finally subtracting 31 results in -152.
Learn more about Simplifying mathematical expressions