$\int cos\sqrt{x-2}dx$
$\int z^4\:lnz\:dz$
$\lim_{x\to0}\left(\frac{x^2+x}{3x^3+3x^2}\right)$
$2x+1=-x+4$
$\frac{\left(2x^{4}y^{3}\right)^{2}y^{4}}{1}$
$a3-5a+1\:entre\:a+2$
$10^{x+y}=5x$
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