Question

1+1-9/7+10+20-50 find the sum of this sum

Answer 1

$1 + 1 - \frac{9}{7} + 10 + 20 - 50 \\ \\ = \geqslant 2 + 30 - 50 - \frac{9}{7} \\ \\ = \geqslant 32 - \frac{350 - 9}{7} \\ \\ = \geqslant 32 - \frac{341}{7} \\ \\ = \geqslant \frac{224 - 341}{7} \\ \\ = \geqslant \frac{ - 117}{7}$