MATH
 Syntax: #MAT variable expression
 Related: #ADD
Assigns the value of the expression to the given variable. Expressions can contain numeric, logical, and text functions. Any variables in the expression are also expanded.
MATH examples
 #MATH test (1+3)*4
 assigns the value of '16' to the variable @test.

 #MATH test2 @test4
 if @test has the value of 16, the value of 12 is assigned to @test2

 #ALIAS add {#MATH value %1+%2}
 add 3 4
 the value of 7 is assigned to the variable @value