MathML Component inherit CSS values from html

H1 style - font size: $x_{12} = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}$

H3 style - font size: $x_{12} = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}$

Normal font size:

x_{12} = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}

Italic 40px:

x_{12} = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}

Background transparent:

x_{12} = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}

Color:

x_{12} = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}