Question

how to find [6(3+42)-4]

Answer 1

[6(3+42)-4]

[6(45)-4]

[270-4]

266

Answer 2

Use P.E.M.D.A.S.
Do what is in the ( ) first so 3+42=45.
That leaves you with [6(45)-4]
Now you Multiply 6×45=270 so [270-4]=266