The $n$th term of a sequence is $a_n = (-1)^{n+1}(3n + 2)$. What is the value of $a_1 + a_2 + \dots + a_{100}$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The $n$th term of a sequence is $a_n = (-1)^{n+1}(3n + 2)$. What is the value of $a_1 + a_2 + \dots + a_{100}$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-150
The $n$th term of a sequence is $a_n = (-1)^{n+1}(3n + 2)$. What is the value of $a_1 + a_2 + \dots + a_{100}$?
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