Evaluate
33
Factor
3\times 11
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20\left(\frac{40}{20}-\frac{7}{20}\right)
Convert 2 to fraction \frac{40}{20}.
20\times \frac{40-7}{20}
Since \frac{40}{20} and \frac{7}{20} have the same denominator, subtract them by subtracting their numerators.
20\times \frac{33}{20}
Subtract 7 from 40 to get 33.
33
Cancel out 20 and 20.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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Matrix
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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}