$\int\left(\frac{\sqrt{\left(x^2+9\right)}}{x^2}\right)dx$

$\left(2xy+x^2+b\right)dx+\left(y^2+x^2+a\right)dy=0$

$\lim_{x\to0}\left(\frac{tan\left(8x\right)-8x}{x^3}\right)$

$\left(x^3+b\right)\:\left(x^{3\:}-8\right)$

$1-\left|0.3\right|$

$\left(\sin\left(x\right)+\tan\left(x\right)\right)^2+cos^2\left(x\right)-sec^2\left(x\right)$

$-6x+12=30$