Multiplication use *
Division use /
1. To input Fractions: use the / (located on the same key as ?) symbol for dividing.
2. To input exponents use the ^ symbol (located above the number 6) for raising a term to a power.
y3 as y^3 is ok
yx as y^x is ok however if a coefficient is added then parenthesis are required
y12x must be entered as y^(12x)
when in doubt use parenthesis.