Perform the indicated operations
[(6x2+10x+7)(26x27x+31)](16x2+9x15)\displaystyle {\left[{\left(-{6}{x}^{{2}}+{10}{x}+{7}\right)}-{\left(-{26}{x}^{{2}}-{7}{x}+{31}\right)}\right]}-{\left({16}{x}^{{2}}+{9}{x}-{15}\right)}


Ans =