Rules:
[tex] - * - =+ [/tex]
[tex]+ * +=+ [/tex]
[tex]- *+ =- [/tex]
[tex]+ * -= - [/tex]
Solution:
[tex](2.9)*(-5)*(0.7)*(18)*(-3) [/tex]
[tex](-14.5)*0.7*18*(-3) [/tex]
[tex](-10.15)*18*(-3) [/tex]
[tex](-182.7)* (-3) [/tex]
[tex]548.1 [/tex]
The answer is: 548.1 ⇒a. positive
