$\"\"$

The function is $\"\"$ .

Apply derivative on each side with respect to $\"\"$ .

$\"\"$

Sum rule of derivatives: $\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$

The differential equation is $\"\"$ .

Consider lefthand side $\"\"$ .

Substitute $\"\"$ and $\"\"$ .

$\"\"$

Simplify the expression.

$\"\"$

Rewrite the expression.

$\"\"$

$\"\"$ .

Therefore, $\"\"$ is a solution of differential equation $\"\"$ .

$\"\"$

$\"\"$ is a solution of differential equation $\"\"$ .