$\lim_{x\to0}\left(\frac{1-cos\left(sinx\right)}{x^2cotx}\right)$
$2x^2+8y-8xy$
$\left(2x^3+y^4\right)^3$
$\lim_{x\to\infty}\left(\frac{3x^2-5}{3x^2+2}\right)^{\left(\frac{3}{5}\right)^2}$
$\frac{9x^2+6x+1}{3x+1}$
$81v^4-144$
$64x^2-38x-25$
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