Changes
/* Part 2 */ added an equation that was accidentally deleted earlier
:<math>f(x) = F'(x)</math>
<br />Then:
:<math>\int_a^b f(x)dx = F(b) - F(a)</math><br />The second part begins with what we know from part 1.
<br />It then states that the definite integral of the function <math>f</math> from <math>a</math> to <math>b</math> is equal to <math>F</math> evaluated at <math>b</math> minus <math>F</math> evaluated at <math>a</math>.
