A math problem that a math emperor can answer! Very difficult! ~ Add the score to 100! ~ (Multiplication, division, addition and subtraction of positive and negative fractions are difficult to calculate) Negative 1 and 13 points 12 times 3 and 15 points 2 minus 1 and 15 points 13 times 4 and 13 points/kloc-0.

= negative 1 and 13 points 12 times 3 and 15 points 2 negative 1 and 15 points 13 times 4 and 13 points/kloc-.

= negative 1 and 13 times 3 and 15 times 2+(3-4 and 13 times 12) and 1 and 15 times/kloc-0.

=- 1 and 13 times 3 and 15 times 2- 1 and 13 times 12 and 15 times 13.

=- 1 13 times12 (3152+115).

=- 1 and 13 part 12 times 5.

=-5 and 65438+60/03

=-9 and 65438+8/03