Hello,
Looking at the question, I can definitely say that PEMDAS is not possible. To use PEMDAS correctly, always start with parentheses or groups, then exponents, multiplication and division, and finally addition and subtraction. PEMDAS simply refers to many scenarios in which everything follows a set of stages in a predetermined order. P (parentheses) stands for any type of grouping, such as brackets, dashes, and braces, as well as groups suggested by radical and fractional expressions. This is the initial step, and you must solve all groups from the inside out.
Exponents and radicals are both represented by the letter E (exponents). From left to right, execute M (multiplication) and D (division). When there are variables and other notations for products and quotients, however, you should be cautious. Additions and subtractions must be done last, from left to right, as shown by the letters An and S.
This could be done through different approaches.
Answers for -28 as describes before by someone
1 -3 -10 -16 = -28
1 -3 -12 -14 = -28
4 -3 -13 -16 = -28
4 -3 -14 -15 = -28
5 -3 -14 -16 = -28
6 -3 -15 -16 = -28
Let’s see some of the possibilities of -48 from this
1 -9 * 5 -4 = -48
4 -9 * 4 -16 = -48
5 -9 * 4 -17 = -48
6 -9 * 4 -18 = -48
Some of the possibilities of 19 from this
3 +8 -1 +9 = 19
3 +8 -2 +10 = 19
Or in the negative
3 +8 -20 +28 = 19
And you can go around…