Can someone me with questions 38, 40 and 42? and you : )

38) -first you have to subtract 4-2=2
      -then solve for 2^5=32
      -subtract 32-20=12
      -and finally multiply 12*3=36
40) -you have to solve for the numerator and denominator first
      -the denominator is simple because you just have to do 2^3 which is 8
      -to solve for the numerator you have to do what's in the parentheses first (3^4-7^2) which gives you 32
      -the equation you should have now is 22+1^3+32 all divided by 8
      -1^3 just equals 1and then you just solve for the numerator
      -to solve for the numerator you have to add 22+1+32 which gives you 55 as the numerator
      -since 55 cannot be divided by 8, your answer will be 55/8 or 6.875
42) -first you have to solve for the parentheses in the brackets so solve for (67-2^6) which equals to 3
      -now your numerator should look like this: 2[8+(3)^3]
      -you have to solve for 3^3 which is 27
      -now you solve what you have left in the brackets [8+27] =35
      -multiply 2*35 which gives you 70
      -70 cannot be divided by 9 so your answer is 70/9 or 7.777777778

#42
2[8+(67 - 2^6)^3]
2[8 + 67^3 - 2^18
2 [ 8 + 300763 - 262144]
2 [ 300771 - 262144]
2 [ 38627 ]
77254 (numerator)

77254/9