def t;
def x = <2,3>;
def y = <-1,-4.5>;
print(x);
print(y);

def w = 2*x + 3;
def z = y+x*<3>;
x = w*z + y*3 + <1,3>; 
print(2*w);

x = arg(x)*3 + ~y;
y = mod(y)*x + re(z)/im(w);

print(x);

x == y;
3*x != x - z;

