Algebra
# Polynomial Arithmetic

\[\sqrt{\sqrt{\sqrt[3]{\color{blue}{64000}} + {\sqrt[3]{\color{blue}{64000} + \color{teal}{3(1640) + 1}}}}}\]

With the assistance of the algebraic identity \( (a+b)^3 = a^3 + b^3 + 3ab(a+b) \), evaluate the above expression.

A lazy mathematician believes that

\[a^2 + b^2 = (a + b)^2.\]

If \(a\) and \(b\) are both integers chosen from the interval \(\left[-100, 100\right]\), then find the number of ordered pairs \((a, b)\) that satisfy the equation above.

\[\sqrt[3]{ 1+ \sqrt{x}} + \sqrt[3]{1 - \sqrt{x}} = \sqrt[3]{5}\]

One solution of the above equation is of the form \(\frac{a}{b},\) where \(a\) and \(b\) are coprime positive integers.

Find \(a+b\).

\[ \begin{eqnarray} \large \color{blue}2^{\color{brown}x} - \color{blue}2^{\color{brown}y} & = & \large 1 \\ \\ \large \color{green}4^{\color{brown}x}- \color{green}4^{\color{brown}y} & = & \large { \frac 5 3} \\ \\ \\ \large {\color{brown}x} - {\color{brown}y} & = & \large \, ? \end{eqnarray} \]

**Details and Assumptions:**

- \(x\) and \(y\) are real numbers.

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