$cosh^2\left(x\right)-sin^2\left(h\right)=1$

$\lim_{x\to-3}\left(\frac{x^2}{e^{-3x}}\right)$

$-3a+17b^2+10b^2+19a^2-9a^2+19-13-12+2c^2+17c+9c-8c$

$\lim_{x\to1}\left(\frac{x^7-1}{x^{30}-1}\right)$

$y^3+3y^2+7y+5$

$4-\ln\left(7-x\right)=y$

$\left(a^3b^3\right)\left(5ba^4\right)$