Simplify the expression below:
a2-9a-3
Simplify the following expression:
3x-3y2x+2y·x2-y2x2-2·x·y+y2
Simplify the fraction below::
a4+1-2a21-a-a2+a3
Solve the following equation:
x-10x-2+x-9x-3+x-8x-4+x-7x-5=-4