Evaluate
80
Factor
2^{4}\times 5
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7+5+5+6+4+2+3+2+3+4+4+4+3+5+8+8+7
Add 3 and 4 to get 7.
12+5+6+4+2+3+2+3+4+4+4+3+5+8+8+7
Add 7 and 5 to get 12.
17+6+4+2+3+2+3+4+4+4+3+5+8+8+7
Add 12 and 5 to get 17.
23+4+2+3+2+3+4+4+4+3+5+8+8+7
Add 17 and 6 to get 23.
27+2+3+2+3+4+4+4+3+5+8+8+7
Add 23 and 4 to get 27.
29+3+2+3+4+4+4+3+5+8+8+7
Add 27 and 2 to get 29.
32+2+3+4+4+4+3+5+8+8+7
Add 29 and 3 to get 32.
34+3+4+4+4+3+5+8+8+7
Add 32 and 2 to get 34.
37+4+4+4+3+5+8+8+7
Add 34 and 3 to get 37.
41+4+4+3+5+8+8+7
Add 37 and 4 to get 41.
45+4+3+5+8+8+7
Add 41 and 4 to get 45.
49+3+5+8+8+7
Add 45 and 4 to get 49.
52+5+8+8+7
Add 49 and 3 to get 52.
57+8+8+7
Add 52 and 5 to get 57.
65+8+7
Add 57 and 8 to get 65.
73+7
Add 65 and 8 to get 73.
80
Add 73 and 7 to get 80.
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}