$9y^2+30y+25$

$3\sec^2\left(x\right)-4$

$\log_bx=0.35$

$y2=-6$

$\int\left(8-\sin\:\left(\frac{x}{2}\right)\right)^3\cdot\cos\left(\frac{x}{2}\right)dx$

$\int\sin\left(34x\right)\cdot\cos\left(4x\right)dx$

$\lim_{x\to+\infty}\left(\left(1+\frac{1}{\sqrt{x}}\right)^x\right)$