Question

2+3-5+6×2-12×1=?????

Answer 1

=2+3-5+12-12
=5-5+0
=0

Answer 2

$= 2 + 3 - 5 + 12 - 12 \\ = 2 + 3 - 5 + 0 \\ = 5 - 5 + 0 \\ = 0$
according to BODMAS rule