While some exercises have a tool from which you can choose a math symbol, there are a limited number of symbols available in the tool. In some cases, there is no tool, and it may not be obvious how you should type a math symbol.
Here's the breakdown on how to enter some common math symbols:
Type * or shift-8 on an American keyboard. Example: 3 times 4 is "3*4".
Use / for division. For example, 3 fourths are entered as 3/4. If you have any operations in the numerator or denominator, surround this with parentheses. For example, 12 divided by 5n would be entered as 12/(5n), and the quantity of n plus 3, all divided by 6, would be entered as "(n+3)/6".
SQRT. For example, to enter the square root of 3, type "sqrt(3)".
Cube roots (and other non-square roots): (see fractional exponents.)
This is for the number approximately equal to 22/7 or 3.14. Type "pi".
This is a Greek letter that looks like a 0 with a horizontal line in the center) Type "theta".
Powers or exponents
Use the ^ symbol, also known as a caret. For example, to enter 4 to the 5th power, type "4^5".
Use the ^ symbol and put the fraction in parentheses. For example, to enter the cube root of x or x to the 1/3 power type "x^(1/3)".
Greater than or equal to
Less than or equal to
For base 10 logarithms, enter "log(x)" where x is the number. For natural logarithms enter "ln(x)".
Logarithms with bases other than 10
A pop-up box should appear when the cursor is in the answer box. If this does not happen, you should be able to enter your answer as "log_b(n)", where b is the base and n is the number.