$\left(t-5\right)\left(2t+7\right)$

$\left(a^3\right)^4$

$\int2x\sin\left(\frac{y}{x}\right)dx$

$\lim_{x\to1}\left(\frac{sinx-1}{arcsin0}\right)$

$-30a^2+25a^4+9a^4$

$\lim_{x\to\infty}\left(\frac{ln\left(5x+7\right)}{ln\left(3x+5\right)+8}\right)$

$-\left(x+y\right)^2$