Yes, you can print photos and documents from your Android tablet (Galaxy S7) or mobile (Galaxy S9) to the HP Smart Tank 7305. Here are the steps you need to follow:

1. connect your Android device and the printer to the same Wi-Fi network. Make sure both devices are connected to the same network.

2. download the HP Print Service plugin and install it on your Android device. This plugin allows you to print directly from your device.

3. open the file you want to print and select the print option. In most apps, you can do this by tapping on the menu icon and then going to "Print". Select your printer from the list of available printers.

4. select the print settings. In the print preview screen, you can adjust the print settings such as paper size, colour and orientation.

5. start the printing process. Once you have made all the settings, tap the print icon to start the printing process.

Follow these steps and you should be able to print photos and documents from your Android device to the HP Smart Tank 7305.