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diff --git a/Qwen2.5-Eval/evaluation/latex2sympy/sandbox/matrix_placeholders.py b/Qwen2.5-Eval/evaluation/latex2sympy/sandbox/matrix_placeholders.py
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+++ b/Qwen2.5-Eval/evaluation/latex2sympy/sandbox/matrix_placeholders.py
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+from latex2sympy import process_sympy
+from sympy import *
+import sys
+import hashlib
+import time
+
+sys.path.append("..")
+
+
+M = Matrix([[1, 2], [3, 4]])
+v = Matrix([1, 2])
+
+# sub settings
+sub_settings_symbols = {}
+sub_settings_symbols[Symbol('M' + hashlib.md5('M'.encode()).hexdigest(), real=True)] = M
+sub_settings_symbols[Symbol('v' + hashlib.md5('v'.encode()).hexdigest(), real=True)] = v
+
+
+# one parameters
+latex = "\\begin{matrix}1&2\\\\3&4\\end{matrix}\\cdot[!v!]"
+equation_sympy_check = MatMul(M, Symbol('v' + hashlib.md5('v'.encode()).hexdigest(), real=True))
+equation_sympy_subs_check = MatMul(M, v)
+# placeholders
+equation_sympy = process_sympy(latex)
+print('latex = %s' % latex)
+print('equation_sympy = %s' % equation_sympy)
+print('equation_sympy_check = %s' % equation_sympy_check)
+print('equation_sympy = %s' % (srepr(equation_sympy)))
+
+equation_sympy_subs = equation_sympy.subs(sub_settings_symbols, evaluate=False)
+print('equation_sympy_subs = %s' % equation_sympy_subs)
+print('equation_sympy_subs_check = %s' % equation_sympy_subs_check)
+
+
+# two parameters
+
+# sub settings
+print('')
+print('============== Two Parameters -> M*v = Matrix*Vector =============')
+sub_settings_symbols = {}
+sub_settings_symbols[Symbol('M' + hashlib.md5('M'.encode()).hexdigest(), commutative=False)] = M
+sub_settings_symbols[Symbol('v' + hashlib.md5('v'.encode()).hexdigest(), commutative=False)] = v
+
+latex = "[!M!]\\cdot[!v!]"
+math_check = Mul(Symbol('M' + hashlib.md5('M'.encode()).hexdigest(), commutative=False), Symbol('v' + hashlib.md5('v'.encode()).hexdigest(), commutative=False))
+# placeholders
+equation_sympy = process_sympy(latex)
+print(latex)
+print(math_check)
+print(equation_sympy)
+print(srepr(equation_sympy))
+
+# performance
+t0 = time.time()
+
+# process_sympy and substitute at the same time
+# Only needed for linalg input
+placeholder_values = {'M': M, 'v': v}
+equation_sympy_subs = process_sympy(latex, variable_values=placeholder_values)
+
+t1 = time.time()
+print('equation with substituted placeholders = %s' % (str(equation_sympy_subs)))
+print('time to process to sympy with placeholders = %s s' % (t1 - t0))
+print('')
+print('============== Two Parameters -> M*v = Matrix*Vector =============')