$\left(-1\right)^2-2\left(-1\right)\left(2\right)+\left(2\right)^2$
$6b^2+17b+5$
$\int_0^{\infty}sin9dx$
$\frac{\cot x}{-1+\csc x}-\frac{\csc x}{\cot x};\tan x$
$6x-3y+5z+3x-5$
$\frac{160}{-8}$
$\frac{\sqrt{2\left(x+h\right)+1\:}\:-\:\sqrt{2x+1}}{h}$
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