Question

10+(23+10×9)+50÷10

Answer 1

PEMDAS 
( ), Exponents, Multiplication, Division, Addition, Subtraction
so first we will do (23+10x9) = 33 x 9 =297 then you do division so 50/10= 5 so right now you have 10+297+5 once you add that you should have 312 as your answer. If you don't follow the PEMDAS rule you will get 128 for your answer.

Answer 2

10+(23+10×9)+50÷10
10+23+90+50÷10
10+23+90+5
128