Разбираемся:
\[(6x - 4y + 5) \cdot 6x = 6x \cdot 6x - 4y \cdot 6x + 5 \cdot 6x\]
\[6x \cdot 6x = 36x^2\]
\[-4y \cdot 6x = -24xy\]
\[5 \cdot 6x = 30x\]
\[36x^2 - 24xy + 30x\]
Ответ: 36x2 - 24xy + 30x