Https://web2.0calc.com/ try this or
this http://rational-equations.com/in-rational-equations/graphing-equations/distributive-property-simplif...
they are math calculator..... hope this helps
I suppose you mean 5y^8.
When y = 4, we have,
5(4)^8 = 5 x 65,536 = 327,680
The figure on the top left is a triangle with base 11 and height 8, for an area of

Immediately below, we have a rectangle with dimensions 11 and 9, for an area of

Moving to the right, we have a parallelogram with base 9 and heght 11, which again has height

Finally, the rightmost figure is a triangle with base 8 and height 9, for a total of

Sum these areas and you'll get the total area
If the total is 360 degrees then it will take 50 degrees each side. If the total is 180 degrees it would be 30 degrees each side