<|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
In the Countdown Game, using 3 to 4 randomly generated numbers and basic arithmetic operations (+, -, *, /), create an equation that equals to -75. You can use each number and arithmetic operation only once in your equation. Write your equation inside <think> </think> tags and provide the final expression and solution in <answer> </answer> tags, for example: <answer> (1 + 2) / 3 = 1.33 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>