Code review comment for lp:~gang65/ubuntu-calculator-app/reboot-upgrade-math-js-to-1.5

Unfortunately with math.js1.5.0 I noticed regression with complex numbers:
With math.js 1.4.0:
   66i*i = -66

With math.js 1.5.0:
   66i*i = -6.6

Bug already submitted:
https://github.com/josdejong/mathjs/issues/319