$\frac{1-\sin\left(x\right)}{\cot\left(x\right)}\:=\sin\left(x\right).\cos\left(x\right)$

$\lim_{x\to0}\left(\frac{-e^x+1}{e^x}\right)$

$8+8d+4+4$

$3a+2x+\left(-6x\right)$

$42+42+42+42$

$\int\left(\frac{x}{\left(\sin\left(x\right)\right)^2}\right)dx$

$8x-5\left(16x^3-10x^2+7x+4\right)$