Derek has 40-14-11-5 = <<40-14-11-5=10>>10 dollars left

Dave has 50-7 = <<50-7=43>>43 dollars left.

Dave has 43-10 = <<43-10=33>>33 more dollars left than Derek.

# Answer

33
<|im_start|>system
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<|im_start|>user
Derek has $40. He spends $14 on lunch for himself, $11 for lunch for his dad, and $5 on more lunch for himself. His brother Dave has $50 and only spends $7 on lunch for his mom. How much more money does Dave have left than Derek?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
33
Derek has $40. He spends $14 on lunch for himself, $11 for lunch for his dad, and $5 on more lunch for himself. His brother Dave has $50 and only spends $7 on lunch for his mom. How much more money does Dave have left than Derek?
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