Evaluate
140
Factor
2^{2}\times 5\times 7
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25-\left(20+15-70-\left(88-18+10\right)\right)
Subtract 75 from 100 to get 25.
25-\left(35-70-\left(88-18+10\right)\right)
Add 20 and 15 to get 35.
25-\left(-35-\left(88-18+10\right)\right)
Subtract 70 from 35 to get -35.
25-\left(-35-\left(70+10\right)\right)
Subtract 18 from 88 to get 70.
25-\left(-35-80\right)
Add 70 and 10 to get 80.
25-\left(-115\right)
Subtract 80 from -35 to get -115.
25+115
The opposite of -115 is 115.
140
Add 25 and 115 to get 140.
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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}