Recommended Usage of ###a1:-a###

It's easier to use  ###a1:-a### instead of ###a1:(-1*a)### in calculations.

For example, in this construction set to produce negative numbers. Original version contains ###a1:(-1*a)###.

###a:r(1,100,0.001)###
###a1:(-1*a)###
###b:r(1,100,0.001)###
###b1:(-1*b)###
###x:randvar(a,a1)###
###y:randvar(b,b1)###

You can as well replace it with ###a1:-a###.

###a:r(1,100,0.001)###
###a1:-a###
###b:r(1,100,0.001)###
###b1:-b###
###x:randvar(a,a1)###
###y:randvar(b,b1)###