- $\frac{3}{2}x^3 + 2x$
- $\dfrac{3}{2}{x}^{3}{+}{2}{x}{-}{4}$
- ${x}^{3}{ }{+}{ }{2}{x}{ }{-}{ }{4}$
- $\dfrac{3}{2}{x}^{3}{y}{+}{2}{x}{y}{-}{4}$