Changed to: sage: plot3d(lambda x,y:(exp(I*2000*(1.60217662*10**(-19))/((299792458*6.6260700 ....: *10**(-34)))-sqrt(I*(1.60217662*10**(-19))/(4*6.62607004*10**(-34)*2997924 ....: 58*2000-(((1.60217662*10**(-19))^2*2000**2)/(((6.62607004*10**(-34))**2)** ....: 299792458**2)))(x**2+y**2)).real_part(),(x,-3*pi,3*pi),(y,0,2),adaptive=Tr ....: ue, color=cmsel)))
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