$35+x-6x^2$
$16z^2-72z+81$
$5x^4-3x^2+2x^2+6x$
$-x\:-\:y\:-\:z-x\:-\:y\:-\:z$
$\cot\left(x\right)=a$
$\left(i^2-1\right)\left(i^4+i^2+1\right)$
$\sqrt[3]{\frac{128a^5}{8b^3}}$
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