$\sec\left(x\right)^4\tan\left(x\right)^2=\left(\tan\left(x\right)^2x+\tan\left(x\right)^4\right)\sec\left(x\right)^2$

$\left(\sqrt{2}\:\:a\right)\left(\sqrt{3}\:\:b\right)$

$44x^2+20x+24$

$-15x^2\left(2x^3-5x^22+3xy-6\right)$

$3^x=-\frac{1}{3}$

$y^5-7y^4+12y^3+8y^2=0$

$\lim\:_{x\to\:\:3}\left(\frac{e^{x^2}-e^9}{x-3}\right)$