fix: powers of complex numbers were incorrect, e.g. (2*I)^0 = 0.
fix: powers of complex numbers were incorrect, e.g. (2*I)^0 = 0.

tomaszkrysiuk/yacas,MateuszSnamina/yacas,tomaszkrysiuk/yacas,tomaszkrysiuk/yacas,tomaszkrysiuk/yacas,MateuszSnamina/yacas,qwert2003/yacas,MateuszSnamina/yacas,martanoga/yacas,qwert2003/yacas,qwert2003/yacas,qwert2003/yacas,MateuszSnamina/yacas,grzegorzmazur/yacas,MateuszSnamina/yacas,MateuszSnamina/yacas,tomaszkrysiuk/yacas,martanoga/yacas,martanoga/yacas,tomaszkrysiuk/yacas,grzegorzmazur/yacas,grzegorzmazur/yacas,grzegorzmazur/yacas,grzegorzmazur/yacas,martanoga/yacas,qwert2003/yacas,grzegorzmazur/yacas,martanoga/yacas,martanoga/yacas,grzegorzmazur/yacas,MateuszSnamina/yacas,martanoga/yacas,tomaszkrysiuk/yacas,qwert2003/yacas,qwert2003/yacas