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I have an equation which is as follows

[D^4+(2*D^3)-(D^2)-(2*D)+(i/(l^4))]y=0

where D=d/dz, l is a constant and i is a complex no.

I want to find out the roots of this equation. How can I find the roots. If there is any online calculator which is capable to do so please let me know.

Thanks in advance

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# Help me in solving this equation

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