1. The problem is to understand how to write mathematical expressions in Delta Math, which is an online platform for math practice. 2. Delta Math uses LaTeX syntax for writing math expressions, which is a standard way to format math on many platforms. 3. For example, to write a fraction, you use the command $\frac{numerator}{denominator}$. 4. To write powers, use the caret symbol, like $x^2$ for x squared. 5. To write square roots, use $\sqrt{expression}$. 6. To write Greek letters like delta, use commands like $\delta$. 7. Important rules: always enclose math expressions in dollar signs $...$ for inline math or double dollar signs $$...$$ for display math. 8. Practice writing simple expressions like $\frac{3}{4}$, $x^3$, and $\sqrt{5}$ to get comfortable. 9. Delta Math also supports equations, inequalities, and functions using these LaTeX commands. 10. Remember to check your syntax carefully to avoid errors in Delta Math.