Use only 7, 5, 6, and 3 to create an expression that equals 75 and you can only use each number once
\(\begin{array}{|rcll|} \hline 75 &=& (3*7-6)*5 \\ 75 &=& (5+7)*6+3 \\ \hline \end{array}\)
5x7+5x7+5=75
[7 * 3 - 6 ] * 5 =
[ 21 - 6 ] * 5 =
[15 ] * 5 =
75