$7x+3+5$

$\tan\:^2\left(x\right)\sin\:\left(2x\right)-2tan\left(x\right)+sin\left(2x\right)=0$

$3g-6\left(g-8\right)=42$

$4y+\left(-6x\right)-5x+1-2y+6$

$\lim_{x\to\infty}\left(\frac{x^2}{e^{4x}}\right)$

$169-x^2$

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