
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the expression below, three of the + signs are changed into - signs so that the expression is equal to 100:
$$
\begin{array}{l}
0+1+2+3+4+5+6+7+8+9+10 \\
+11+12+13+14+15+16+17+18+19+20
\end{array}
$$

In how many ways can this be done?

Present the answer in LaTex format: \boxed{Your answer}
user