JavaScript Taskbook Level 10.7

Given a table. When you click on any cell, this cell is highlighted in some color, becoming active. Make it so that in one row of the table no more than 5-th cells can be activated.

Given a table. When you click on any cell, this cell is highlighted in some color, becoming active. Make it so that in one column of the table you can activate no more than 5-th cells.

Given a table. When you click on any cell, this cell is highlighted in some color, becoming active. Make it so that for an activated cell its neighbors to the left and right cannot be activated.

Given a table. When you click on any cell, this cell is highlighted in some color, becoming active. Make it so that for an activated cell it is impossible to activate its neighbors above and below.

Input is given. A long word is entered into it. Output a list of words that can be formed from the letters of the word entered into the input.

Given a textarea. It contains text. The user selects several lines of text and presses the key Alt + Tab. Make it so that the tabulation is removed from the beginning of each selected line.

Given a string containing two fractions and a mathematical operation between them:

Write code that will calculate the result of the written mathematical operation.