ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi>z</mi><mi>n</mi></msup><mo>=</mo><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><msup><mi>x</mi><mi>n</mi></msup><mo>-</mo><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mfrac linethickness="1"><mi>n</mi><mn>2</mn></mfrac><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo><msup><mi>x</mi><mrow><mi>n</mi><mo>-</mo><mn>2</mn></mrow></msup><msup><mi>y</mi><mn>2</mn></msup><mo>+</mo><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mfrac linethickness="1"><mi>n</mi><mn>4</mn></mfrac><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo><msup><mi>x</mi><mrow><mi>n</mi><mo>-</mo><mn>4</mn></mrow></msup><msup><mi>y</mi><mn>4</mn></msup><mo>-</mo><mo>&#x022EF;</mo><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mo>+</mo><mi>i</mi><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mfrac linethickness="1"><mi>n</mi><mn>1</mn></mfrac><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo><msup><mi>x</mi><mrow><mi>n</mi><mo>-</mo><mn>1</mn></mrow></msup><mi>y</mi><mo>-</mo><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mfrac linethickness="1"><mi>n</mi><mn>3</mn></mfrac><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo><msup><mi>x</mi><mrow><mi>n</mi><mo>-</mo><mn>3</mn></mrow></msup><msup><mi>y</mi><mn>3</mn></msup><mo>+</mo><mo>&#x022EF;</mo><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow></mrow></math>