Evaluate
18
Factor
2\times 3^{2}
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\frac{4+1}{4}\times 9+\frac{3}{4}\times 9
Multiply 1 and 4 to get 4.
\frac{5}{4}\times 9+\frac{3}{4}\times 9
Add 4 and 1 to get 5.
\frac{5\times 9}{4}+\frac{3}{4}\times 9
Express \frac{5}{4}\times 9 as a single fraction.
\frac{45}{4}+\frac{3}{4}\times 9
Multiply 5 and 9 to get 45.
\frac{45}{4}+\frac{3\times 9}{4}
Express \frac{3}{4}\times 9 as a single fraction.
\frac{45}{4}+\frac{27}{4}
Multiply 3 and 9 to get 27.
\frac{45+27}{4}
Since \frac{45}{4} and \frac{27}{4} have the same denominator, add them by adding their numerators.
\frac{72}{4}
Add 45 and 27 to get 72.
18
Divide 72 by 4 to get 18.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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}