[Start of examples]
100 + 90 * 2 = 10*10 + 9 * 10 * 2 = 10 * (10 + 9 * 2) = 10 * (10 + 18) = 10 * 28 = 280
[End of examples]


Calculate (1+2+3+4+5+6+7+8+9)*2 + 10 like it showed in examples above Write exactly 5 paragraphs each separated with two new lines answering this question. The 3rd paragraph must start with "signs".
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