1. A
   $-\frac{29}{15}$
2. B
   $\frac{7}{3}$
3. C
   $\frac{31}{15}$
4. D
   $\frac{29}{15}$

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1. A
   $\frac{1}{2}$
2. B
   $1$
3. C
   $\frac{1}{\sqrt{2}}$
4. D
   $\sqrt{2}$

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1. A
   $\frac{2 \cdot 4^x \log 4}{1 + 4^{2x}}$
2. B
   $\frac{4^{x + 1} \log 2}{1 + 4^{2x}}$
3. C
   $\frac{4^{x + 1} \log 4}{1 + 4^{4x}}$
4. D
   $\frac{2^{2(x + 1)} \log 2}{1 + 2^{4x}}$

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1. A
   $\frac{x(x \log y - y)}{y(y \log x - x)}$
2. B
   $\frac{y(y \log x - x)}{x(x \log y - y)}$
3. C
   $\frac{y^2(1 - \log x)}{x^2(1 - \log y)}$
4. D
   $\frac{y(1 - \log x)}{x(1 - \log y)}$

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1. A
   $\frac{2 - 4x^2}{\sqrt{1 - x^2}}$
2. B
   $\frac{2 + 4x^2}{\sqrt{1 - x^2}}$
3. C
   $\frac{4x^2 - 1}{\sqrt{1 - x^2}}$
4. D
   $\frac{1 - 2x^2}{\sqrt{1 - x^2}}$

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1. A
   $\frac{x}{\sqrt{1 - x^2}}$
2. B
   $\frac{1 - 2x}{\sqrt{1 - x^2}}$
3. C
   $\frac{1 - 2x}{2\sqrt{1 - x^2}}$
4. D
   $\frac{1 - 2x^2}{\sqrt{1 - x^2}}$

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1. A
   $2$
2. B
   $0$
3. C
   $-1$
4. D
   $1$

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1. A
   $1 + x^7$
2. B
   $\frac{1}{1 + [g(x)]^7}$
3. C
   $1 + [g(x)]^7$
4. D
   $7x^6$

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1. A
   $\frac{1}{(1 + x)^2}$
2. B
   $-\frac{1}{(1 + x)^2}$
3. C
   $(1 + x)^2$
4. D
   $-\frac{x}{x + 1}$

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1. A
   $\frac{x}{\sqrt{a^2 - x^2}}$
2. B
   $\frac{a}{\sqrt{a^2 - x^2}}$
3. C
   $-\frac{1}{2\sqrt{a^2 - x^2}}$
4. D
   $\frac{1}{2\sqrt{a^2 - x^2}}$

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1. A
   $\frac{8\sqrt{2}}{a\pi}$
2. B
   $-\frac{8\sqrt{2}}{a\pi}$
3. C
   $\frac{a\pi}{8\sqrt{2}}$
4. D
   $\frac{4\sqrt{2}}{a\pi}$

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1. A
   $x^2$, $-x$, $-y$
2. B
   $x^2$, $x$, $y$
3. C
   $x^2$, $x$, $-y$
4. D
   $x^2$, $-x$, $y$

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