$4x \times \left( 6{x}^{2}-x+2 \right)+2\left( 6{x}^{2}-x+2 \right)$
Distribute $4x$ through the parentheses$24{x}^{3}-4{x}^{2}+8x+2\left( 6{x}^{2}-x+2 \right)$
Distribute $2$ through the parentheses$24{x}^{3}-4{x}^{2}+8x+12{x}^{2}-2x+4$
Collect like terms$24{x}^{3}+8{x}^{2}+8x-2x+4$
Collect like terms$24{x}^{3}+8{x}^{2}+6x+4$