$\left(d-19\right)\left(d-5\right)$

$\tan\left(a\right)=\sin\left(a\right)^2\sec\left(a\right)^2$

$-5x^2+2x\:+\:25\:<\:0\:\:\:\:\:$

$5-\left(8+3-4\left(8-3-\left(4-6\right)+\left(8+2\right)\right)+3\right)$

$\int\left(3x+1\right)\sqrt{x-4}dx$

$\left(3x^2y^2\right)\:\left(-7x^4y^4z\right)\:\left(-10x^3y^5z^3\right)\:$

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