$\frac{x^4+4x^3-4x^2+5}{x-2}$
$\frac{d^2}{dx^2}\left(\sin\left(x^2+y^2\right)\right)$
$a^2+2ab+b^2-1$
$7+5x-5+x+2$
$\sin\left(x\right)=0.7142857143$
$3x-6>2x-12$
$\lim_{x\to0}\left(\frac{\cos\left(3x\right)-e^x+x}{x\sin\left(x\right)}\right)$
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