which of the following gives the sum of
[tex] - 2 {x}^{3} [/tex]
[tex]a.10 {x}^{3} + ( - 8 {x}^{3})[/tex]
[tex]b.14 {x}^{3} + ( - 16 {x}^{3})[/tex]
[tex]c.4x - 2x[/tex]
[tex]d. - 5 {x}^{3} - 4 {x}^{3} [/tex]
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