Derivative of a Line in Calculus

The derivative of a line represents the slope of the line, which is a measure of how steep the line is. In calculus, the derivative is a fundamental concept used to determine the rate at which a function changes at any given point. For a straight line defined by the linear equation (y = mx + b), where (m) is the slope and (b) is the y-intercept, the derivative with respect to (x) is constant and equals (m). This constant slope indicates a uniform rate of change across all points on the line, illustrating that the function's rate of change does not vary along its length.

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Hi sir ! Please solve this problem.
integrate x ^ 7 * 1/(x ^ 7 + (9 - x) ^ 7) dx from 0 to 9 =