If $a = 2$, $b = 3$ and $c = 4$, what is the numerical value of the expression $(b-c)^2 + a(b+c)$ ?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $a = 2$, $b = 3$ and $c = 4$, what is the numerical value of the expression $(b-c)^2 + a(b+c)$ ?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
15
If $a = 2$, $b = 3$ and $c = 4$, what is the numerical value of the expression $(b-c)^2 + a(b+c)$ ?
train