Math Problem Solver

$$18 + 36 e - 14 + 21 e = 4 + 57 e \approx 158.94206422216557841553638586710176$$

$$\begin{aligned}18 + 36 e - 14 + 21 e&=18 + 36 \cdot e - 14 + 21 \cdot e\\&=\left(18 + 36 \cdot e\right) - 14 + 21 \cdot e\\&=\left(4 + 36 \cdot e\right) + 21 \cdot e\\&=4 + 57 \cdot e\end{aligned}$$

$e$ is Euler's number, a mathematical constant that is approximately $2.71828$.