<|im_start|>system
You are a helpful assistant. You first thinks about the reasoning process in the mind and then provides the user with the answer.<|im_end|>
<|im_start|>user
Generate three valid equations that use the numbers [5, 9, 4.5, -2] that equals the target number 13, using each number only once in the equation. Show your working in <think> </think> tags. The first equation should equal 13. The second equation should use a different operation and third one should use a different combination of numbers. Return the final equations and answers in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>