$\left(x-4\right)^2-\left(4-x\right)^2+\left(x-8\right)^2-x^2-25$
$8x\le3x+10$
$x2\:+\:6x+\:81=0$
$a^6-9$
$4 + 5 - 3 + 5 - 6 + 2 + 3$
$\int\frac{\sqrt{x}}{x-81}dx$
$\int\left(\frac{\left(t+3\right)}{t^2+2t+1}\right)dx$
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