In this example we are multiplying two binomials so FOIL method can be used.

$$ \begin{aligned} \left( \color{blue}{ 6x^2-5}\right) \cdot \left( \color{orangered}{ 6x^2-5}\right) &= \underbrace{ \color{blue}{6x^2} \cdot \color{orangered}{6x^2} }_{\text{FIRST}} + \underbrace{ \color{blue}{6x^2} \cdot \left( \color{orangered}{-5} \right) }_{\text{OUTER}} + \underbrace{ \left( \color{blue}{-5} \right) \cdot \color{orangered}{6x^2} }_{\text{INNER}} + \underbrace{ \left( \color{blue}{-5} \right) \cdot \left( \color{orangered}{-5} \right) }_{\text{LAST}} = \\ &= 36x^4 + \left( -30x^2\right) + \left( -30x^2\right) + 25 = \\ &= 36x^4 + \left( -30x^2\right) + \left( -30x^2\right) + 25 = \\ &= 36x^4-60x^2+25; \end{aligned} $$

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