2 , 3 , 6 , 0 , 10 , - 3 , 14 , ( . . . )
"there are two series 2 , 6 , 10 , 14 , . . . ( adding 4 ) 3 , 0 , - 3 , . . . ( subtracting 3 ) hence , next term is - 3 - 3 = - 6 answer is a"
subtract(negate(0), multiply(subtract(3, 6), divide(subtract(3, 6), subtract(2, 3))))