What is the value of $1980 ÷ 9 + [-77 + \begin{Bmatrix}-1980 + (\frac{1}{4} of \,7920 )\end{Bmatrix}]$?

1990 1980 164 143

143

$1980 ÷ 9 + [-77 + \begin{Bmatrix}-1980 + (\frac{1}{4} of \,7920 )\end{Bmatrix}]$ = 220 + [ - 77 + {-1980 + 1980}] = 220 + [ - 77 + 0] = 143