(a1+a2+a3)/3
2+((a*x)/3)
15 + abs(13-36)
-24.8*10
a+(8*b*x)+(15*c*y*z)
((a*b)/c)+(c/(a*b))
(x+y)/a a2/(x-y)
10*a - 3.5
y = -2.7*(x**3)+(0,23*(x**2))-1.4
