$\left(2a^3+7b^4\right)^2$

$\lim_{x\to0}\left(\frac{x-10\sin\left(x\right)}{2-e^{2x}-5^x}\right)$

$2tan\left(x\right)=\frac{1}{sec\left(x\right)-tan\left(x\right)}-\frac{1}{sec\left(x\right)+tan\left(x\right)}$

$\left(-5\right)^5\left(-5\right)^5$

$182-1182-1182-1$

$\log_a\left(\frac{x}{y}\right)=\log_a\left(x\right)-\log_a\left(y\right)$

$25cos^2\left(x\right)-9=0$