1
Make x the subject of:
r=x+y/2
$9^{4}$ $$\prod_{a=1}^{b}{a}$$
(1/6):(1/8):(1/24)
14+4equals
3x=8
Make r the subject of:
1,2,3 $$\prod_{a}^{b}{C}$$ 2,3,4
πsecπsecxπsecπsecx