Evaluate
2\left(4-7x\right)x^{3}
Factor
2\left(4-7x\right)x^{3}
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-6x^{4}+8x^{3}-4x^{4}\times 2
To multiply powers of the same base, add their exponents. Add 2 and 2 to get 4.
-6x^{4}+8x^{3}-8x^{4}
Multiply 4 and 2 to get 8.
-14x^{4}+8x^{3}
Combine -6x^{4} and -8x^{4} to get -14x^{4}.
2\left(-3x^{4}+4x^{3}-4x^{2}x^{2}\right)
Factor out 2.
x^{3}\left(-3x+4-4x\right)
Consider -3x^{4}+4x^{3}-4x^{4}. Factor out x^{3}.
-7x+4
Consider -3x+4-4x. Multiply and combine like terms.
2x^{3}\left(-7x+4\right)
Rewrite the complete factored expression.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}