Math puzzles

You must use the four numbers below to make the desired result. You may use the basic math to do so: +,-,*, /, (). Every day you will find two new puzzles.

Good luck.

Puzzle 1

The numbers: 2 4 6 7 must make: 22

Puzzle 2

The numbers: 1 4 6 7 must make: 7

Puzzle 3

The numbers: 1 7 7 7 must make: 3

Puzzle 4

The numbers: 4 4 4 4 must make: 48

Puzzle 5

The numbers: 1 4 7 9 must make: 10

Puzzle 6

The numbers: 3 5 7 9 must make: 23

Puzzle 7

The numbers: 3 3 5 8 must make: 30