Question

-3.(-5)-7:[(-21):3+5.(14:(-2)+7]

Answer 1

- 3 x (-5) - 7 : [ (-21) : 3 + 5 x ( 14 : (-2) + 7 ) ] =

= 15 - 7 : [ - 7 + 5 x (- 7 + 7)] =

= 15 - 7 : [ - 7 + 5 x 0 ] =

= 15 - 7 : -7 =

= 15 - 1 =

= 14