
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
Let two lines \\(l_1:(3+m)x+4y=5-3m\\) and \\(l_2:2x+(m+1)y=-20\\). If \\(l_1 \nparallel l_2\\), then \\(m=\\)       ; if \\(l_1 \perp l_2\\), then \\(m=\\)            ;

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