$2cot\left(2x\right)=\frac{1}{tan\:x}-\:tan\:x$
$9x-4y+z=-8$
$\int_2^2\left(\frac{x}{4}+1\right)^3dx$
$x^3-\frac{21}{2}x^220$
$-4\:x\:-10$
$\left(104-6x\right)^2$
$x^4+2x^3-23x^2-60x$
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