# Writing Mathematical Equations

Document created by Vishal Sharma on Jan 12, 2017Last modified by Vishal Sharma on Jan 12, 2017
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This article will help you enter equations for mobile-friendly assignments. The equation entry module gives you the tools needed to represent the components of mathematical expressions, including numbers, variables, and functions. Once entered, your answer will look very similar to how you would write it on paper.

### Tool Details

Here is a description of the tools available in the equation entry module.

1. Basic: This tab includes a virtual keyboard for numbers and functions. On a desktop, you may also type numbers (and some symbols like + and -) directly from your physical keyboard
2. abc: This tab includes a virtual keyboard for lowercase letters.On a desktop, you may also type letters directly. Keep in mind that grading is case sensitive. Adjacent letters are automatically separated by a multiplication dot symbol.
3. ABC: This tab includes a virtual keyboard for uppercase letters. On a desktop, you may also type letters directly. Keep in mind that grading is case sensitive. Adjacent letters are automatically separated by a multiplication dot symbol.
4. πΣθ: This tab includes a virtual keyboard for Greek letters. Adjacent letters are automatically separated by a multiplication dot symbol.
5. Left and right arrows: Use these on-screen buttons to move your cursor within the module. On a desktop, you can also use the arrow keys on your physical keyboard.
6. DEL: Use this button to delete the term that's immediately to the left of the cursor
7. CLEAR: Use this button to delete everything in entry box.
8. Close: Use the button marked with an X to close the toolbar.
9. Numeric keypad: Use these buttons to enter numbers 0-9 or a decimal point.
10. Operators: Use these buttons to indicate division, multiplication, subtraction, and division between terms. The subtraction button may also be used before a term to make it negative.
11. Fraction: Use this button to add fractions. The cursor starts in the numerator of a new fraction and can be moved with the arrow keys.
12. Exponent: Use this button to add an exponent to the term immediately left of the cursor. Use the arrow keys to move the cursor in or out of the exponent box. Click the exponent button again while your cursor is in the exponent field will add and exponent to that exponent.
13. Parentheses, brackets, and absolute value: Use these buttons to add an empty set of parentheses. brackets, or absolute value bars, within which you can begin typing. Any of these adjacent to each other or to other letters are automatically separated by a multiplication dot symbol. Use the arrow keys to move the cursor.
14. Square root, logarithm, and natural logarithm: Use these tools to add a square root, logarithm (base ten), or natural logarithm function. Functions that are adjacent to existing terms are automatically separated by a multiplication dot symbol.
15. Common symbols: Use these buttons to enter x, y, π, or e

If a response is incorrectly formatted, it will trigger a warning "Cannot interpret equation". Examples of improper formatting include ending in an operator, or having a blank exponent box.