Evaluate
2\left(y-z\right)
Expand
2y-2z
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-x-\left(-y\right)-\left(-z\right)-\left(-x-y+3z\right)
To find the opposite of x-y-z, find the opposite of each term.
-x+y-\left(-z\right)-\left(-x-y+3z\right)
The opposite of -y is y.
-x+y+z-\left(-x-y+3z\right)
The opposite of -z is z.
-x+y+z-\left(-x\right)-\left(-y\right)-3z
To find the opposite of -x-y+3z, find the opposite of each term.
-x+y+z-\left(-x\right)+y-3z
The opposite of -y is y.
-x+2y+z-\left(-x\right)-3z
Combine y and y to get 2y.
-x+2y-2z-\left(-x\right)
Combine z and -3z to get -2z.
-x+2y-2z+x
Multiply -1 and -1 to get 1.
2y-2z
Combine -x and x to get 0.
-x-\left(-y\right)-\left(-z\right)-\left(-x-y+3z\right)
To find the opposite of x-y-z, find the opposite of each term.
-x+y-\left(-z\right)-\left(-x-y+3z\right)
The opposite of -y is y.
-x+y+z-\left(-x-y+3z\right)
The opposite of -z is z.
-x+y+z-\left(-x\right)-\left(-y\right)-3z
To find the opposite of -x-y+3z, find the opposite of each term.
-x+y+z-\left(-x\right)+y-3z
The opposite of -y is y.
-x+2y+z-\left(-x\right)-3z
Combine y and y to get 2y.
-x+2y-2z-\left(-x\right)
Combine z and -3z to get -2z.
-x+2y-2z+x
Multiply -1 and -1 to get 1.
2y-2z
Combine -x and x to get 0.
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}