Find all the integer roots of $2x^4 + 4x^3 - 5x^2 + 2x - 3 = 0.$  Enter all the integer roots, separated by commas.
<|im_start|>system
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<|im_start|>user
Find all the integer roots of $2x^4 + 4x^3 - 5x^2 + 2x - 3 = 0.$  Enter all the integer roots, separated by commas.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1,-3
Find all the integer roots of $2x^4 + 4x^3 - 5x^2 + 2x - 3 = 0.$  Enter all the integer roots, separated by commas.
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