$f\left(x\right)=\:\left(2x+5\right)\left(3x-4\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{1-sen\left(x\right)}{\left(\frac{\pi}{2}-x\right)^2}\right)$

$a+x\cdot x^2$

$150m^2n^2-240mn^6-360m^3n^2$

$\left(x-1\right)\left(x-\frac{5}{2}\right)$

$y+\tan\left(x\right)y=\cos^2\left(x\right)$

$-11-\left(-72\right)$