$\int x^2\sec^2\left(x^3\right)\left(\tan\left(x^3\right)\right)dx$
$[x^{3}]^{2}$
$( 2 x ^ { 3 } + 5 y ) ^ { 2 }$
$x^2-4x+5>0$
$\lim_{x\to-3}\frac{\left(x+1\right)}{x+4}$
$\int_{-1}^{+\infty}\left(72+\frac{x}{1+x^2}\right)dx$
$5-0.25$
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