문제 1선택형6×6×6×6×6×6×6×6×6×9÷9÷9÷99×66×6×6×66×96\times6\times6\times6\times6\times6\times6\times6\times6\times9\div9\div9\div\frac99\times66\times6\times6\times6^6\times96×6×6×6×6×6×6×6×6×9÷9÷9÷99×66×6×6×66×96\times6\times6\times6\times6\times6\times6\times6\times6\times9\div9\div9\div\frac99\times66\times6\times6\times6^6\times93∫0∞5dx×∫0∞9dx∫0∞6dx−3×9÷×6×6×6×9÷93\int_0^{\infty}\!5\,dx\times\int_0^{\infty}\!9\,dx\int_0^{\infty}\!6\,dx-3\times9\div\times6\times6\times6\times9\div96×6×6×6×6×6×6×6×6×9÷9÷9÷99×66×6×6×66×96\times6\times6\times6\times6\times6\times6\times6\times6\times9\div9\div9\div\frac99\times66\times6\times6\times6^6\times9
