$\left(5x^2y-7x^4y^6\right)^3$

$\lim_{x\to0}\:\left(7x\right)^{\sin\left(8x\right)}$

$\int\frac{2cos^2x}{sinx}dx$

$51^22^33$

$\frac{\sin\left(2x\right).\csc\left(x\right)-\cot\left(x\right).\sin\left(x\right)}{\cos\left(x\right)}$

$.\left(x+3\right)\left(x-1\right)+7$

$m^2-11m+28$