Written by Alexey Velikiy, Evgeniy Krasko. APTU 2012. Usage: rpTask2 <FILE> [EXPR] Parse definitions from FILE and evaluate EXPR if it is. example 1: rpTask2 input.txt example 2: rpTask2 input.txt "{x-> defF x + 1} 2" In example 2 function defF defined in file input.txt"); with others like this: "defF = {x->x*x}; id={x->x}; pi = 314"