$x+2<5$
$4x^3\cdot5x$
$16^2-48xy+36y^2$
$\int\left(-\frac{5}{3x^6}\right)dx$
$sin2x+sinx-cos2x+cosx+1$
$\lim_{x\to\infty}\left(\frac{x+8}{x+7}\right)^2$
$\int\left(\left(-81x^2-42x-27\right)\left(9x^3+7x^2+9x+4\right)\right)dx$
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