Question

5+(7-2)-(4+3)
45-{51+[(-3)-(+8)]}

Answer 1

$5+(7-2)-(4+3)$

$5 + 5 - 7$

$10 - 7$

$3$

$45-[51+[(-3)-(+8)]]$

$45 - [51 +[-11]$

$45 - [51 - 11]$

$45 - 40$

$5$