1. The problem is unclear as "take l x" does not specify a mathematical operation or expression. 2. Please provide a complete mathematical expression or clarify the operation you want to perform involving variables or functions. 3. For example, if you want to take the logarithm of $x$, you can specify $\log(x)$ or $\ln(x)$. 4. If you want to multiply $l$ and $x$, the expression is $l \times x$ or simply $lx$. 5. Please clarify your question so I can assist you better.