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-4a
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-4a
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3a-\left(3a-4a\right)-\left(-a\right)-\left(7a+2a\right)
Combine 2a and a to get 3a.
3a-\left(-a\right)-\left(-a\right)-\left(7a+2a\right)
Combine 3a and -4a to get -a.
3a+a-\left(-a\right)-\left(7a+2a\right)
The opposite of -a is a.
4a-\left(-a\right)-\left(7a+2a\right)
Combine 3a and a to get 4a.
4a-\left(-a\right)-9a
Combine 7a and 2a to get 9a.
4a+a-9a
Multiply -1 and -1 to get 1.
5a-9a
Combine 4a and a to get 5a.
-4a
Combine 5a and -9a to get -4a.
3a-\left(3a-4a\right)-\left(-a\right)-\left(7a+2a\right)
Combine 2a and a to get 3a.
3a-\left(-a\right)-\left(-a\right)-\left(7a+2a\right)
Combine 3a and -4a to get -a.
3a+a-\left(-a\right)-\left(7a+2a\right)
The opposite of -a is a.
4a-\left(-a\right)-\left(7a+2a\right)
Combine 3a and a to get 4a.
4a-\left(-a\right)-9a
Combine 7a and 2a to get 9a.
4a+a-9a
Multiply -1 and -1 to get 1.
5a-9a
Combine 4a and a to get 5a.
-4a
Combine 5a and -9a to get -4a.
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}