24[1/8(3x-1+x²)-2/3(x³-2x²+3)-x}

24[1/8(3x-1+x²)-2/3(x³-2x²+3)-x}
24[1/8(3x-1+x²)-2/3(x³-2x²+3)-x}

24[1/8(3x-1+x²)-2/3(x³-2x²+3)-x}
24[1/8(3x-1+x²)-2/3(x³-2x²+3)-x]
=24*1/8(3x-1+x²)-24*2/3(x³-2x²+3)-24*x
=3(3x-1+x²)-16(x³-2x²+3)-24x
=9x-3+3x²-16x³+32x²-48-24x
=-16x³+3x²+32x²+9x-24x-3-48
=-16x³+35x²15x-51