$\left(\frac{2}{7}a-\frac{4}{3}c+4\right)-\left(\frac{1}{3}a+\frac{1}{7}b-\frac{2}{3}c+9\right)$

$\left(3x^4+5y^2\right)^2$

$10t-4t+3t+8$

$\int_{-b}^b\left(x^2-b^2\right)^4dx$

$\lim_{x\to\infty}\left(\frac{6x-1}{\sqrt{x^2+5}}\right)$

$\lim_{x\to0}\left(\frac{1}{x^3}-\frac{1}{x^3tan\left(x\right)}\right)$

$\frac{2x^3+3x-2x^2+2}{x-1}$