$\left(y^3\right)^2\left(d^2\right)^2\left(y^4\right)^2$

$y^4+8^2$

$\frac{sin\left(2t\right)}{sin\left(t\right)}$

$\left(7h+3k\right)^2$

$6n^2+19n+10$

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

$-40=12x+8$