Math Problem Solver

$$\frac{123456789012345678901234567890}{123456789012345678901234567890} + 123456789012345678901234567890 - 123456789012345678901234567890 + 68 = 69$$

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of $\frac{123456789012345678901234567890}{123456789012345678901234567890}$, $\frac{123456789012345678901234567890}{1}$, $\frac{-123456789012345678901234567890}{1}$, and $\frac{68}{1}$ is $123456789012345678901234567890$. $$\begin{aligned} \frac{123456789012345678901234567890}{123456789012345678901234567890} + 123456789012345678901234567890 - 123456789012345678901234567890 + 68 &= \frac{123456789012345678901234567890 \cdot 1}{123456789012345678901234567890 \cdot 1} + \frac{123456789012345678901234567890 \cdot 123456789012345678901234567890}{1 \cdot 123456789012345678901234567890} + \frac{-123456789012345678901234567890 \cdot 123456789012345678901234567890}{1 \cdot 123456789012345678901234567890} + \frac{68 \cdot 123456789012345678901234567890}{1 \cdot 123456789012345678901234567890} \\ &= \frac{123456789012345678901234567890 + 15241578753238836750495351562536198787501905199875019052100 + -15241578753238836750495351562536198787501905199875019052100 + 8395061652839506165283950616520}{123456789012345678901234567890} \\ &= \frac{8518518441851851844185185184410}{123456789012345678901234567890} \\&= 69 \end{aligned}$$