Expected : "1 * 5 = 5\n 2 * 5 = 10\n
                       ^ this space is never in expected

Expected : "1 * 5 = 5\n 2 * 5
                ^   ^       ^  this one is 5 
Got : "1 * -40 = -40\n 2 * -40
           ^^^   ^^^       ^^^ but this is -40?

I guess you also made those changes in the note app then.

I don't see how you could possibly obtain this error message

Expected : "1 * 5 = 5\n 2 * 5 = 10\n 3 * 5 = 15\n 4 * 5 = 20\n 5 * 5 = 25\n 6 * 5 = 30\n 7 * 5 = 35\n 8 * 5 = 40\n 9 * 5 = 45\n 10 * 5 = 50

Got : "1 * -40 = -40\n 2 * -40 = -80\n 3 * -40 = -120\n 4 * -40 = -160\n 5 * -40 = -200\n 6 * -40 = -240\n 7 * -40 = -280\n 8 * -40 = -320\n 9 * -40 = -360\n 10 * -40 = -400"

that is not at all what the error messages look like when I run it, for example, you've written "Got :" with two line terminators before it, while the actual output is ", instead got:" with no line terminator, and the expected one is 5 while got is -40, a closing double is missing, spaces appearing out of nowhere ..

this is what they do look like:

Expected: "1 * 5 = 5\n2 * 5 = 10\n3 * 5 = 15\n4 * 5 = 20\n5 * 5 = 25\n6 * 5 = 30\n7 * 5 = 35\n8 * 5 = 40\n9 * 5 = 45\n10 * 5 = 50", instead got: " 1 * 5 = 5\n 2 * 5 = 10\n 3 * 5 = 15\n 4 * 5 = 20\n 5 * 5 = 25\n 6 * 5 = 30\n 7 * 5 = 35\n 8 * 5 = 40\n 9 * 5 = 45\n 10 * 5 = 50"

I copied and pasted your code, removed the space at the end, and passed both sample and attemp tests.

Remove that space you've added at the end, and your code will pass.