Can u evaluate this

Question

[4-(3-7(7-4)+4)]+7

Answer 1

 

start with inner most bracket

(7-4) is 3 so replace this bracket with 3

[4-(3-7*3+4)] +7

do the multiplication in the bracket - 7*3 is 21

[4-(3-21+4)]+7

then sort out the bracket (3-21+4) is -14

[4-(-14)]+7  

minus minus is +, so 4+14 is 18

18+7 is 25.

Double check this answer by putting it in exactly into a scientific calculator as i might of made a simple mistake somewhere