Answer :
pemdas
parenthasees inner most first
(2+4)
(6)
[42-(6)^2]
exponents
[42-36]
[6]
13[6]=13 times 6
78
parenthasees inner most first
(2+4)
(6)
[42-(6)^2]
exponents
[42-36]
[6]
13[6]=13 times 6
78
