latex rendering issues debugging

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hint

interval $$[a, b]$$ and interval $$(a, b)$$. point $$c$$ where $$f'\(c) = 0$$.

interval $$[a, b]$$ and interval $$(a, b)$$. point $$c$$ where $$f'\(c) = 0$$.

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of $\frac{1}{\sqrt{x}}$?

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Rank $j(x) = \sqrt{4x + 1}$.

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I. The definite integral $\int_{0}^{\pi} \cos(x) dx$ equals 0.II. The definite integral $\int_{1}^{2} (3x^2 + 2x + 1) dx$ equals $\frac{17}{3}$.III. The definite integral $\int_{-2}^{2} x^3 dx$ equals 0.Which of the following statements are true?

does not have new lines?