$x^2\cdot x^3x^4$

$t\frac{11}{t^2}$

$\int\frac{25\left(4x^{-2}+5\left(\sqrt[3]{x}\right)\right)^2}{-3\left(\sqrt[3]{x}\right)}dx$

$\lim_{x\to\infty}\left(\frac{5\left(e^{4x}\right)}{4x^2}\right)$

$\frac{5}{8}=\frac{25}{x}$

$\lim_{x\to\infty}4x^2$

$\left(a^3+5x\right)^3$