Question 939868
this part p^3^ is confusing; I guess you have only {{{p^3}}}

{{{2p(p^3 +1)}}}   if{{{ p = -2}}}, then we have

{{{2(-2)((-2)^3 +1)}}}

={{{-4(highlight((-2)(-2)(-2)) +1)}}}

={{{-4(highlight((-2)(-2))(-2) +1)}}}

={{{-4((highlight(4)(-2)) +1)}}}

={{{-4(highlight(4(-2)) +1)}}}

={{{-4(highlight(-8) +1)}}}

={{{-4(-7)}}}

={{{28}}}