a=1
b=2
a+b

a += 1
a *= -2
a -= 2
a /= 2
a ^= 4

c=1;c*=5+2;c+1
c
c=1;c*=(5+2);c+1
c

d=1+2*5
d

d=(((1+2*5))+1)+1
d

