for how many unique pairs of nonnegative integers { a , b } is the equation a ^ 2 - b ^ 2 = 235 true ?
"answer b ( a + b ) ( a - b ) = 235 2 cases for ( a + b ) , ( a - b ) 235 , 1 47 , 5 answer b"
divide(log(235), log(add(const_4, const_1)))