<node name="standard" channel="inline" format="number/complex-cartesian" model="2+4"/>
<node name="negative_imaginary_part" channel="inline" format="number/complex-cartesian" model="2-4"/>
<node name="negative_real_part" channel="inline" format="number/complex-cartesian" model="-2+4"/>
<node name="both_parts_negative" channel="inline" format="number/complex-cartesian" model="-2-4"/>
<node name="decimal_fractions" channel="inline" format="number/complex-cartesian" model="-1.2+5.0"/>
<node name="scientific_notation" channel="inline" format="number/complex-cartesian" model="-1.2e6+.11e2"/>