Step 1 : \ \

The expression is $\"\"$

Consider integration part : $\"\"$ .

$\"\"$

Step 2 : \ \

Consider summation part : $\"\"$

$\"\"$ \ \

\ \

Sum of $\"\"$ natural numbers is $\"\"$

Sum of squares of the $\"\"$ natural numbers is $\"\"$

Solution : \ \

Hence the expression is verified.