$\frac{1}{73}+\pi$
$4+2-b$
$f\left(x\right)=\frac{8x^{2}-5x+1}{2x^{2}+2}$
$x^3+xy$
$\frac{\left(2sen^2\left(o\right)-1\right)^2}{sen^2\left(o\right)-cos^2\left(o\right)}=1-2cos^2\left(o\right)$
$x^6+y^4-2x^2-8y:10$
$\frac{d}{dx}7x^2-2$
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