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\displaystyle {\left({7}{b}+{5}\right)}^{{2}}=

\displaystyle {2}{\left({7}\right)}{\left({5}\right)}

=

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\displaystyle

Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question

Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity