$5x+y^2+1+x+y^2+1$
$\lim_{x\to\frac{\pi}{4}}\left(\frac{1-2cos^2xtanx}{cos^2xcos2x}\right)$
$5x^3\left(8x^5y-\frac{8}{3}x^3y^2\right)$
$\left(14a^6+16b^3\right)^3$
$\left(-7\right)^6$
$\frac{1}{1+\infty}$
$12a+a$
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