Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 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?


### Response:
 Derek a 40-14-11-5 = <<40-14-11-5=10>>10 dollars restants
Dave a 50-7=<<50-7=43>>43 dollars restants.
Dave a 43-10= <<43-10=33>>33 dollars de plus restants que Derek.