`#AkaShi`
`A=(2x+3)^2+(4x^2-6x+9)-2(4x^3-1)`
`A=(2x)^2+2*2x*3+3^3+4x^2-6x+9-8x^3+2`
`A=4x²+12x+9+4x^2-6x+9-8x^3+2`
`A=(4x^2+4x^2)+(-8x^3)+(12x-6x)+(9+9+2)`
`A=8x^2-8x^3-6x+20`
`\text{__________________________________________________________________}`
`B=(x+1)^2-4x(x+1)(x-1)+3(x-1)(x^2+x+1)`
`B=(x³+3x^2+3x+1)-4x(x^2-1)+3(x^3-1)`
`B=x³+3x²+3x+1-4x^3+4x+3x^3-3`
`B=(x^3+3x^3-4x^3)+3x^2+(3x+4x)+(1-3)`
`B=0+3x^2+7x-2`
`B=3x^2+7x-2`
`\text{__________________________________________________________________}`
