Expand $(x^{22}-3x^{5} + x^{-2} - 7)\cdot(5x^4)$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Expand $(x^{22}-3x^{5} + x^{-2} - 7)\cdot(5x^4)$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
5x^{26}-15x^9-35x^4+5x^2
Expand $(x^{22}-3x^{5} + x^{-2} - 7)\cdot(5x^4)$.
train