$-7x+3y+5x$

$\lim_{x\to\infty}\left(\frac{t^{\frac{2}{3}}}{1}\right)$

$-4\cdot\left(-12+4\right)$

$f\left(x\right)=\left(x-4\right)^2+7$

$\lim\:_{x\to\:\frac{\pi\:}{2}}\tan^2\left(x\right)\left[1-\sin\left(x\right)\right]$

$\lim_{x\to0}\left(\frac{\frac{4}{2+x}-2}{x}\right)$

$\frac{8y^3+27}{2y+3}$