$\frac{\cos^2\left(x\right)}{\sin^2\left(x\right)}=1$
$y^2+6y+36$
$-2^{-\sqrt{3}-5}$
$\left(9\right)\left(-9\right)\left(4\right)\left(-9\right)$
$32\pi4^{\frac{2}{3}}+72\cdot4^{\frac{2}{3}}\sqrt{3}$
$\left(x-\left(1+i\right)\right)\left(x-\left(1+i\right)\right)$
$9x^4+12x^2y^2+4y^4$
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