
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
In a configuration of two right triangles, $PQR$ and $PRS$, squares are constructed on three sides of the triangles. The areas of three of the squares are 25, 4, and 49 square units. Determine the area of the fourth square built on side $PS$.

[asy]
defaultpen(linewidth(0.7));
draw((0,0)--(7,0)--(7,7)--(0,7)--cycle);
draw((1,7)--(1,7.7)--(0,7.7));
draw((0,7)--(0,8.5)--(7,7));
draw((0,8.5)--(2.6,16)--(7,7));
draw((2.6,16)--(12.5,19.5)--(14,10.5)--(7,7));
draw((0,8.5)--(-5.6,11.4)--(-3.28,14.76)--(2.6,16));
draw((0,7)--(-2,7)--(-2,8.5)--(0,8.5));
draw((0.48,8.35)--(0.68,8.85)--(-0.15,9.08));
label("$P$",(7,7),SE);
label("$Q$",(0,7),SW);
label("$R$",(0,8.5),N);
label("$S$",(2.6,16),N);
label("25",(-2.8/2,7+1.5/2));
label("4",(-2.8/2+7,7+1.5/2));
label("49",(3.8,11.75));
[/asy]

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