$\sqrt{x^4}-y^2$
$\frac{x^{10}+x^6+3x^4-2x^2-1}{x^3-x}$
$sin\:x\:=\:\frac{5}{12}$
$-x^3\:+\:3x^2\:+\:13x\:-\:15$
$20+90+51mnuv$
$3x^2-10x+2$
$\left(x-\left(1+i\right)\right)^2$
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