How to format your answers

What you want

What you type

$x^2$

x^2

$x^{-2}$

x^(-2)

$x^{12}$

x^(12)

$\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$

(-b+/-sqrt(b^2-4ac))/(2a)

$asin(\theta)$

asin(theta)

SE0EM2 Exam Paper 2015