Custom dice rolls please

I'd like to suggest these ideas to make dice rolling quicker and easier.

1) using the dice roller (at the bottom left of the screen as I type this today), a button or two to add a modifier (either positive or negative). Example, I want to roll 1d8+2d6+5.

Huge bonus points for these additional options.
• Having the optional ability to type in standard dice notation vs just clicking on the dice. Like in the example above, where I could just type 1d8+2d6+5.
• The ability to save custom dice rolls. Either a "history" button that would perhaps save your last 5 dice rolls, or even better the ability to add a custom button to the character sheet itself. 

Thanks for your consideration.