
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given a triangle  $ABC$  with angles  $\angle A = 60^{\circ}, \angle B = 75^{\circ}, \angle C = 45^{\circ}$ , let  $H$  be its orthocentre, and  $O$  be its circumcenter. Let  $F$  be the midpoint of side  $AB$ , and  $Q$  be the foot of the perpendicular from  $B$  onto  $AC$ . Denote by  $X$  the intersection point of the lines  $FH$  and  $QO$ . Suppose the ratio of the length of  $FX$  and the circumradius of the triangle is given by  $\dfrac{a + b \sqrt{c}}{d}$ , then find the value of  $1000a + 100b + 10c + d$ .

Present the answer in LaTex format: \boxed{Your answer}
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