Problems
Function - 3
Function - 3
Implement a function f(x, y) = x^2 + sin(x * y) - y^2.
Input data
Each line contains two real numbers x and y.
Output data
For each test case print in a separate line the value of the function f(x, y) with four digits after the decimal point.
Examples
Input example #1
2.234 2.12 10 23 56.1 0.012 23.26 5.1
Output example #1
-0.5034 -429.6161 3147.8333 514.3327