$\frac{3}{11}+\frac{7}{11}+\frac{12}{11}$

$\sin\left(x\right)=-\frac{\sqrt{31}}{7}$

$-ab+5cb-10ab-6c+9cb-2c+3b$

$8\left(2z+4\right)-3\left(3z-6\right)+5$

$\lim_{x\to\infty}\left(\frac{3+x}{3^x}\right)$

$\int\cos^2\left(x\right).\left(\sin\left(x\right)+\csc^2\left(x\right)\right)dx$

$\left(5m^3-\frac{4}{9}n^2\right)^3$