$\lim_{x\to1}6\cos\left(x-1\right)$
$\left(x+5\right)^2+x^2-10x+25$
$-\left(-4\right)+5+6-\left(-7\right)$
$\left|\left(3x+2\right)\left(3x-2\right)\right|^2$
$\sqrt{\frac{\sin^2\left(x\right)}{2\cos^2\left(x\right)}}$
$\ln\left(xy\right)+y^2,x=e^t,y=e^{-t}$
$\left(\frac{3m^3}{m^4}\right)^2$
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