4

# 4

-4 - 6

# -10

var x = 3; x

# 3

var x = 3; var y = x*x; x

# 3

var x = 3; var x = x*x; x

# 9

var x = 3; var y = x*x; y

# 9

2 + (var x = 2; x)

# 4