$\left( \dfrac{x}{2} - \dfrac{2}{x^2} \right)^4$

$\left( 2a - \dfrac{x}{a} \right)^7$

$\left( \sqrt{\dfrac{a}{x}} - \sqrt{\dfrac{x}{a}} \right)^6$

$(0.97)^3$

$(2.02)^4$

$(9.98)^4$

$(2.1)^5$

$(a + \sqrt{2}x)^4 + (a - \sqrt{2}x)^4$

$(2 + \sqrt{3})^5 + (2 - \sqrt{3})^5$

$(2 + x - x^2)^4$

$(1 - x + x^2)^4$

$x^4$ in the expansion of $(3 - 2x)^7$

$x^{-2}$ in the expansion of $\left( x - \dfrac{2}{x^2} \right)^{13}$

$a^4$ in the expansion of $\left( \dfrac{2}{x} - a \right)^9$

$y^3$ in the expansion of $(x - \sqrt{y})^{11}$

$x^5$ in the expansion of $\left( x^2 - \dfrac{3}{2x} \right)^{10}$

$x^n$ in the expansion of $\left( x^2 - \dfrac{1}{x} \right)^{2n}$

$\left( x - \dfrac{2}{x} \right)^{10}$

$\left( \sqrt{x} + \dfrac{1}{2x^2} \right)^{10}$

$(1 + x^2)^3 \left( 1 + \dfrac{1}{x^2} \right)^4$

$\left( \dfrac{1}{x} - \dfrac{x^2}{2} \right)^{12}$

$\left( \dfrac{3}{2}x - \dfrac{1}{3x} \right)^{11}$

$\left( 2x - \dfrac{1}{2x} \right)^{2n+1}$