two=fun_two;
three=fun_three;
add=fun_add;
sub=fun_sub;
mul=fun_mul;
power=fun_power;
disp=fun_disp;
init_lambda(); disp(mul(add(two,three),add(two,two)))
init_lambda(); disp(power(add(two,three),add(two,two)))
init_lambda(); disp(sub(mul(three,three),add(two,two)))
