$9x-4+-11x+9$
$\frac{-10x^5}{20x^{11}}$
$2cos^2x-3sen^2x=0$
$2x-0x^1$
$\left(1+i\right)\left(1+i\right)\left(1+i\right)\left(1+b\right)$
$\cos\left(1\right)\tan\left(1\right)=\sin\left(1\right)$
$3-\left|\left(5-8\right)-\left(3\cdot6\right)\right|$
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