$\"\"$

\

The function is $\"integral$

\

Let $\"italic$

\

$\"d$ (Apply the derivative)

\

$\"c$ ( $\"d$ )

\

$\"\"$

\

Lower limit:

\

when $\"x$ then $\"u$

\

Upper limit:

\

When $\"x$ then $\"u$

\

$\"integral$ (Substitute $\"italic$ and $\"c$ )

\

$\"equal$ (Apply the integral power rule)

\

$\"equal$

\

$\"equal$ (The fundamental theorem of calculus)

\

$\"equal$

\

$\"\"$

\

Therefore $\"integral$ .