$\"\"$

The expression is $\"\"$ .

$\"\"$ (Product of two different signs is negative)

$\"\"$ (To subtract the fractions the denominators must be equal)

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (As denominators are same, write difference of numerators over denominator)

$\"\"$ (Subtract the numerators) $\"\"$

The sum is $\"\"$ .