The most common reasons for syntax error when starting to use the checker are:
1) The relation is missing
2) The calculation has been made in the text field (red border), instead of the calculation field (blue border)
3) If using the word problem template, the answer line is missing
4) Certain operations for example f(x), derivatives, must be chosen from the math panel, or written using the right syntax which starts with \ . Hover over the symbol in the math panel to learn the correct syntax.