Evaluate
42
Factor
2\times 3\times 7
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-64\left(-0.5\right)-\frac{\left(-2\right)^{2}}{-\frac{2}{5}}
Calculate -4 to the power of 3 and get -64.
32-\frac{\left(-2\right)^{2}}{-\frac{2}{5}}
Multiply -64 and -0.5 to get 32.
32-\frac{4}{-\frac{2}{5}}
Calculate -2 to the power of 2 and get 4.
32-4\left(-\frac{5}{2}\right)
Divide 4 by -\frac{2}{5} by multiplying 4 by the reciprocal of -\frac{2}{5}.
32-\frac{4\left(-5\right)}{2}
Express 4\left(-\frac{5}{2}\right) as a single fraction.
32-\frac{-20}{2}
Multiply 4 and -5 to get -20.
32-\left(-10\right)
Divide -20 by 2 to get -10.
32+10
The opposite of -10 is 10.
42
Add 32 and 10 to get 42.
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}