(5/4 + 3/2) /2
5/4 +3/2 /2
8/3 * 6
8/3 * 3
$\frac{\-2}{\3}$ ×4
7-1,3
$\frac{\-2}{\3}$ ×(-2)
$\frac{\-2}{\3}$
0.5
[(2A.X^-1)+B^-1]=-3B
