$1\right)$ Resuelve las siguientes divisiones. a. $\left(6x^{3}-12x^{2}+3x\right):\left(-3x\right)=$ d. $\left(4x^{3}-8+3x+2x^{2}$ $\right):\left(2x^{2}-x\right)=$ b. $\left(2x^{3}+3x^{2}+5\right):\left(2x-1\right)=$ e. $\left(2x^{5}-3x^{3}+x^{4}+x^{2}\right):\left(x^{3}-x+1\right)=$ c. $\left(x^{3}-6x^{2}+2\right):\left(\dfrac {1} {3}x+1\right)=$ –