<|im_start|>system
You are a helpful assistant. You first thinks about the reasoning process in the mind and then provides the user with the answer.<|im_end|>
<|im_start|>user
Using the numbers [280, 7, 4, 6], create an equation that equals 442. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer><math xmlns="http://www.w3.org/1998/Math/MathML"> <semantics> <mrow> <mrow> <mrow> <mo>(</mo> <mrow> <mo>(</mo> <mrow> <mn>2</mn> <mo>*</mo> <mn>8</mn> <mo>*</mo> <mn>5</mn> <mo>*</mo> <mn>2</mn> </mrow> <mo>)</mo> </mrow> <mo>)</mo> </mrow> <mo>/</mo> <mrow> <mo>(</mo> <mrow> <mi>a</mi> <mo>+</mo> <mn>1</mn> </mrow> <mo>)</mo> </mrow> </mrow> </mrow> </mrow> <annotation encoding="application/x-tex">(\left(2*8*5*2
ight)/\left(a+1
ight))\end{annotation></semantics> </mrow> </math> </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>