Found this:
12-7*6+19-14=11
Add brackets only (no limit) so above is correct.
I can't do it...
I simply don't know...
The fact that * is used for multiplication in the problem seems to eliminate (1)(9).
Found this site which "apparently" solved it...but can't join the damn place:
https://www.chegg.com/homework-help/...laces-q7371809
these are the 14 ways in which the expression can be calculated
$\displaystyle 12-(7*(6+(19-14))),$
$\displaystyle 12-(7*((6+19)-14)),$
$\displaystyle 12-((7*6)+(19-14)),$
$\displaystyle 12-((7*(6+19))-14),$
$\displaystyle 12-(((7*6)+19)-14),$
$\displaystyle (12-7)*(6+(19-14)),$
$\displaystyle (12-7)*((6+19)-14),$
$\displaystyle (12-(7*6))+(19-14),$
$\displaystyle ((12-7)*6)+(19-14),$
$\displaystyle (12-(7*(6+19)))-14,$
$\displaystyle (12-((7*6)+19))-14,$
$\displaystyle ((12-7)*(6+19))-14,$
$\displaystyle ((12-(7*6))+19)-14,$
$\displaystyle (((12-7)*6)+19)-14$
14 is the $\displaystyle 4^{th}$ Catalan number
(there are 4 operations in the given expression and 5 operands)
and the 14 possible values
$\displaystyle \{-65,-65,-35,-149,-35,55,55,-25,35,-177,-63,111,-25,35\}$
11 does not appear in the list (but there is a 111)