$\left(4-3\right)\cdot\left(10-15\right)$

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

$0.22ln\left(10^{-2a}\:10^{2x}+1\right)$

$cos^{-1}\left[cos\left(\frac{-29\pi}{15}\right)\right]$

$\left(+24\right)-\left(+1\right)$

$1-10p-9p+8$

$4b^0\cdot4a^3b^{-4}$