I assume x is squared in first term

3x^2+2x-y

=3 (-6)^2+2(-6)-(8)

=3*36-12-8

=108-20

=88

3 x -6 x 2 + 2 x (-6) - 8 =

-18 x 2 + 2 x (-6) -8 =

-36+2 x(-6)-8=

-34 x (-6)-8=

204-8

=196

The gist of the communicate obtainable (sorry, there are too many pages to furnish all the links) is that wands help to concentration the magic resident in the witch or wizard, yet wandless magic remains attainable, relatively for extremely gifted human beings like Snape and Dumbledore. some examples ... Apparition Assuming one's Animagus type (or Metamorphpagus) Accio (the Summoning attraction) Elves can do magic devoid of utilising wands Lumos