[(-9)-(+4)]-(+8)
(x)/(x^(2)-4)< (1)/(x-2)
(y-x)dx + (x+y)dy = 0
30 times 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...
1/60+1/3=?
850รท86
f (x, y) = ex+y+1
[(+8)-(-7)]-(-5)
300000000000000000000000000000000000000000000000000 times 100000000000000000000000000000000000000000000000000000000000000000000000...
(16/4)*6+5
