Evaluate
70
Factor
2\times 5\times 7
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15+7+9+5+4+9+10+7+4
Add 7 and 8 to get 15.
22+9+5+4+9+10+7+4
Add 15 and 7 to get 22.
31+5+4+9+10+7+4
Add 22 and 9 to get 31.
36+4+9+10+7+4
Add 31 and 5 to get 36.
40+9+10+7+4
Add 36 and 4 to get 40.
49+10+7+4
Add 40 and 9 to get 49.
59+7+4
Add 49 and 10 to get 59.
66+4
Add 59 and 7 to get 66.
70
Add 66 and 4 to get 70.
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}