find the 15 th term of an arithmetic progression whose first term is 2 and the common difference is 3 .
"n th term of a . p = a + ( n - 1 ) * d = 2 + ( 15 - 1 ) * 3 , = 2 + 42 = 44 . answer : c"
add(multiply(subtract(15, const_1), 3), 2)