Упростите выражение ((a-b)/(a+b)+b/a)/((a/(a+b)-(a-b)/a)

( ( a - b ) / ( a + b ) + b / a ) / ( ( a / ( a + b ) - ( a - b ) / a )( (a - b )* a + b * ( a +b )) / (a * ( a + b)) / ( a * a - (a + b) * ( a - b) ) / (a * ( a + b) )( a * a - b *a + b * a + b * b ) / (a * ( a + b) / ( ( a * a - ( a * a - b * b ) ) / (a * ( a + b) )( a * a + b * b ) / (a * ( a + b) / ( ( a * a - a * a + b * b ) ) / (a * ( a + b) )( a * a + b * b ) / (a * ( a + b) / ( + b * b ) / (a * ( a + b) )( a * a + b * b ) / (a * ( a + b) *( (a * ( a + b) ) / b* b )( a * a + b * b ) / b * b