$\lim_{x\to\infty}\left(\frac{x^8-34}{x-3}\right)$
$7m+12n+21m+20n+32n$
$\cos\left(20.8x\right)-\cos\left(12.6x\right)$
$\frac{1-\cos\left(x\right)^2}{1+\sin\left(x\right)}$
$\left(b^{2x}\right)^{2x}$
$2-2n=3n+17$
$81w^4z^6-121q^4$
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