What proximate value should come in place of the question mark (?)…

What proximate value should come in place of the question mark (?) in the following question? 6.695 × 1084 + 2568.34 – 1708.34 = ?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #6655