Find the quotient and remainder using long division for
6x5+8x4+10x321x230x392x37\displaystyle \frac{{{6}{x}^{{5}}+{8}{x}^{{4}}+{10}{x}^{{3}}-{21}{x}^{{2}}-{30}{x}-{39}}}{{{2}{x}^{{3}}-{7}}}

 
Enter your answer in quotient + remainder/divisor form.