2*2*2*2+(16-3*4)/(6+3*3)/(7-4)
x+2y+3z=10 2x+3y+z=1 3x+y-2z=9
(6 + 2i)(1 − 5i)/(7 + 4i)
-1+9
5
-13 = r/9+8
How many numbers under 100 are divisible by three
47/a-1=2
5/12×√3+2/2
24=3(n-5)
2×22/7×5.5
