$\int sen^{\left(4\right)}xcos^{\left(4\right)}xdx$

$\lim_{x\to0}\left(3\sec\left(x\right)-3\tan\left(x\right)\right)$

$-6mn+9$

$\lim_{x\to\infty}\left(\sqrt{4x^2+3x}-2x\right)$

$3\left(5x^2+2x-3\right)-1$

$\frac{\left(m^3+9m^2+30m+40\right)}{\left(m+4\right)}$

$\lim_{x\to9}\left(\frac{x^3-3x-54}{x-9}\right)$