$\int\left(x^2+1\right)\cdot sin\left(\frac{11}{13}x\right)dx$

$14\cdot6$

$\int\left(\cos\left(x\right)+\frac{1}{5}x\right)dx$

$3\left(2z-6\right)$

$\frac{1-csc^2\left(x\right)}{cot\left(x\right)-cot\left(x\right)csc\left(x\right)}$

$y^2-4y=\cos3a$

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