$\left(35423 + 7164 + 41720\right)$ - $\left(317 \times 89\right)$ = ?
35423
+ 7164
+ 41720
---------
84307
- 28213
---------
56094
---------
317 x 89 = 317 x $\left(90 -1\right )$
=$ \left(317 \times 90 - 317\right)$
= $\left(28530 - 317\right)$
= 28213
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