(20+18+16+14+12+10+8+6+4+2=
Evaluate
110
Factor
2\times 5\times 11
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38+16+14+12+10+8+6+4+2
Add 20 and 18 to get 38.
54+14+12+10+8+6+4+2
Add 38 and 16 to get 54.
68+12+10+8+6+4+2
Add 54 and 14 to get 68.
80+10+8+6+4+2
Add 68 and 12 to get 80.
90+8+6+4+2
Add 80 and 10 to get 90.
98+6+4+2
Add 90 and 8 to get 98.
104+4+2
Add 98 and 6 to get 104.
108+2
Add 104 and 4 to get 108.
110
Add 108 and 2 to get 110.
Examples
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{ 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}