Question 566593
={{{-x^2-3x^3-x^4}}}
x=-3
={{{-(-3)^2-3(-3)^3-(-3)^4}}}
={{{-9-3(-27)-81}}}
={{{-9+81-81}}}
={{{-9+cross(81)-cross(81)}}}
={{{-9}}}


={{{-x^2-3x^3-x^4}}}
x=3
={{{-(3)^2-3(3)^3-(3)^4}}}
={{{-9-3(27)-81}}}
={{{-9-81-81}}}
={{{-9-81-81}}}
={{{171}}}