0.002*450
x+1 = $\sqrt{14}$
3/4*9
6850รท3.5
5400/12
15*3600
$5^{a}$=225
$3^{b}$=225
(a+b)/ab=?
5/22+2/11
3/7*7
f(x)=e^(x)(ax)
