$4a+3+10-9a$

$\lim_{x\to+\infty}\left(\frac{ln\left(3+5e^x\right)}{\sqrt{3+5x^2}}\right)$

$2x^2-6x-1=0$

$\int\left(\frac{\sin\left(\frac{1}{x}\right)}{3x^2}\right)dx$

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

$\left(4+4-3\right)+6$