In Exercises, find an antiderivative of f (x), call it F (x), and compare the graphs of F (x) and f (x) in the given window to check that the expression for F (x) is reasonable. [That is, determine whether the two graphs are consistent. When F (x) has a relative extreme point, f (x) should be zero; when F (x) is increasing, f (x) should be positive, and so on.]

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f(x) = ²x + e¯x + x², [-2.4, 1.7] by [-10, 10]