Answer:
[tex]-\frac{65}{28}[/tex] or [tex]-2\frac{9}{28}[/tex]
Step-by-step explanation:
Add all fractions:
[tex]-1\frac{3}{4}[/tex] + [tex]-\frac{1}{28}[/tex] + [tex]-\frac{15}{28}[/tex] = [tex]-\frac{65}{28}[/tex]
Simplify if needed:
[tex]-\frac{65}{28}[/tex] = [tex]-2\frac{9}{28}[/tex]