Subt (MPI)
From Tapestries MUCK
subt
{subt:expr1,expr2} {subt:expr1,expr2,expr3...}
Returns the difference of the values expr1 and expr2.
If more than two args are given, all values are subtracted from the first value in sequence.
For example:
{subt:10,3,2,4}would be read as 10 - 3 - 2 - 4, and it would return a result of 1.