403
Glitch in the matrix
(ani.social)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
except 1 is what you get from strictly following PEMDAS. If you got 16 then you missed one of more rules.
Go back and read your link again. You'll find they're obeying The Distributive Law. i.e. solve all brackets first, from inner-most out.
There's no such thing as implicit multiplication