E in engleza
Simplify expression a to d and multiply the brackets in expression e to h :

a) 3a+4a+a
b) 4x+3y-y+2x
c) 5m-3n+m-2n
d) 5s+5t-3t+3s
e) 2 (a+b)
f) 35 (2x-y)
g) 3(m+3n)
h) 4 (2s-3t)