integral a - b =
integral a - a =
0
integral a - b cdx =
c * (b-a)
integral a - b f(x)+-g(x)dx =
integral a - b f(x)dx +- integral a - b g(x)dx
integral a - b cf(x)dx =
c * integral a - b f(x)dx
integral a - b f(x)dx =
integral c - a f(x)dx + integral a - b f(x)dx