Question

999+856-(456+1506)+9-28

Answer 1

$999+856-(456+1506)+9-28 = -126$

$999 + 856 = 1855$
$456 + 1506 = 1962$
$1855 - 1962 = -107$
$-107 + 9 = -98$
$-98 - 28 = -126$